Knauf perlfix mounting adhesive: instructions for use, properties, technical characteristics - instructions for installation and use of building materials

Features and applications of glue

Perlfix installation adhesive composition is a dry gypsum-based mixture that includes polymer additives that increase the level of adhesion to various substrates. This bulk mixture is intended directly for working with drywall (gypsum plasterboard), but is also suitable for cladding vertical surfaces with the following building materials:

Styrofoam;
mineral wool;
gypsum panels and blocks with a matte surface;
expanded polystyrene;
tongue-and-groove slabs;
insulating materials.

The composition ensures reliable fixation of finishing materials even without the use of additional fastening, and the manufacturer guarantees no damage for several decades. The product is very convenient to use: it just needs to be diluted with water and applied manually to the cladding sheets. The pasty mass does not flow, does not slide, and is ideally evenly distributed over the surface being treated. The base can be concrete, brick, or various blocks.

There is a limitation in the use of Perlfix glue: it cannot be used in rooms with high levels of humidity. Application is allowed only at normal and slightly increased humidity, but provided that direct contact with water is avoided

During the work process, it is also important to pay attention to the quality of preparation of walls and finishing materials. They must be completely dry, otherwise the reliability of the gluing will decrease.

Types and forms of release

You can find two types of glue on sale: standard and with the inclusion of gypsum fiber - “Perlfix” and “Perlfix GV”, respectively. Both products are suitable only for interior work; their use outside buildings or in high humidity is unacceptable. Adhesives differ in the level of adhesion to drywall - Perlfix GV has it slightly better, although both products can be used on all of the materials listed above. When purchasing, you should check the certificate of conformity so as not to purchase a fake.

The adhesives are packaged in durable paper bags with internal protection of 15 kg and 30 kg. If the packaging is damaged, you will have to pour the dry construction mixture into tight bags to completely exclude the access of moisture - otherwise the gypsum in the composition may become damp and deteriorate.

Glue composition

The basis that ensures reliable fastening of drywall is gypsum - a mineral substance from the sulfate class, environmentally friendly and completely safe to use. Due to the mineral base, the bulk mixture can have white, grayish and even pink colors, and the shade can vary slightly in different batches of material. The color of the mixture does not affect its technical characteristics and consumption per 1 m2. In addition to gypsum, the composition includes polymer additives that act as additional binder components, reducing the porosity of gypsum plasterboard and reinforcing the surface.

Properties and characteristics

There is no need to add other components to dry glue except ordinary water; it does not require the introduction of hardeners or solvents. The finished solution has little moisture resistance, but it has a number of other positive properties:

resistance to mechanical damaging factors;
fast setting - in half an hour;
Possibility of use for puttying work, sealing seams between plasterboard sheets;
enhanced adhesion due to the introduction of special additives into the composition;
long shelf life under the right conditions;
Possibility of use in unheated buildings;
environmental friendliness of the composition.

Perlfix glue has a moderate cost - 350-380 rubles for a large package, which is also its advantage and allows it to reduce overall repair costs. You can work with the product at temperatures of +5...+30 degrees, but it shows the best results at +22...+25 °C. When the temperature drops below +5 degrees, peeling of the adhesive from finishing materials and walls is often observed.

The solution will have to be diluted in small portions - its viability is short (only 30 minutes). In order for the fixation of drywall to be reliable, the layer must be sufficient - about 2 cm. The time for complete curing of the composition and the start of operation must be maintained, it is equal to 7 days. Only after its expiration can full load be given to the treated surfaces. After the same period, it is allowed to grout the joints. The disadvantages include the short time it takes to adjust the position of finishing materials - up to 5-10 minutes, which may not be suitable for beginners.

Release form

Perlfix glue is packaged in bags. Paper bags have a special impregnation that protects the bulk mixture from moisture. Bag weight – 30 kg. Knauf manufacturers strictly monitor the weight of packages. Their packaging complies with GOST 8.579-2001.

Basic composition of adhesive for aerated concrete blocks, its varieties

The composition of special adhesive for aerated concrete can be discussed in general terms. The fact is that some polymer modifying additives and the characteristics of the cement used are not advertised by manufacturers and are often classified as proprietary secrets. And the production technology of different companies can also have significant differences.

However, we can safely say that the mixture consists of:

— high-quality Portland cement;

— quartz (sand) filler of a very fine fraction;

- a whole complex of special mineral and synthetic additives that determine the special qualities of the adhesive mixture.

Adhesive compositions come on sale in the form of a ready-made dry mixture in packaging familiar to any builder or finisher: multilayer paper bags, most often 25 kilograms each. The composition is diluted with ordinary water according to the attached instructions. The adhesive is ready for use immediately before the start of laying, as it has a rather limited time before it begins to set.

Despite the identity in purpose and basic composition, adhesive mixtures still have a certain classification.

So, they are divided into thick-layer and thin-layer

Thin-layer ones are intended for masonry with seams not exceeding 3÷5 mm. Such compositions are usually used with high-quality aerated concrete blocks that have almost ideal geometry. That is, adjustment of the block positions with the help of a solution, if required anywhere, is minimal.

On the packaging of this glue it is indicated as “thin-layer”. The layer thickness may simply be indicated, for example, from 2 to 5 mm.

Thick-layer compositions are more universal, as they allow working with gas silicate blocks that have errors in shape and size. Their characteristics indicate that the layer thickness can reach 10 (sometimes more) millimeters.

You are unlikely to see the wording “thick layer” on the packaging. The maximum thickness of the seams is simply indicated as 10 or even more millimeters.

It is clear that the possible thickness is indicated, but not at all mandatory. That is, whenever possible, you should still strive to maintain the minimum - the reasons have already been mentioned above.

* * * * * * *

The next classification criterion concerns the conditions for performing masonry work. Namely, there are summer and universal adhesives.

Summer mixtures - they are allowed to be used for outdoor work only at positive temperatures, usually above + 5℃.

The advantage of summer options is that they are usually made of white cement. That is, after the masonry dries, when applied in thin layers, the seams become practically invisible against the background of the blocks. In some cases, this somewhat simplifies the finishing work.

Almost identical packaging, but indicating the “winter” and “summer” mixture. So you need to be more careful.

Winter adhesive compositions allow construction work to be carried out even at low temperatures, about -10÷15 ℃. And this lower limit must either be indicated on the packaging or stated in the instructions for use of the composition.

By the way, such a gradation can be quite arbitrary. Some manufacturers offer universal mixtures in their assortment, without dividing them into “winter - summer”. Simply, when choosing a composition, if you are already planning to carry out masonry, you should purchase one that matches the weather conditions and suits other selection criteria: seam thickness, color, cost.

Terms of use

All recommendations for the use of glue are indicated by the manufacturer on the packaging. The instructions are simple and clear, and the exact proportions for diluting the mixture are indicated there.

How to calculate consumption

It is better to make all the calculations in advance in order to purchase the required amount of glue. The approximate consumption per 1 m2 is 5 kg of the finished mixture, as indicated by the manufacturer. It may be slightly higher or lower depending on specific conditions, for example, on the quality of the surface, the degree of its unevenness, and also on the experience of the master.

How to glue drywall with Perlfix - instructions

First you need to prepare the base. Dust, particles of old coating, and other contaminants are removed from a wall or other surface. Since drywall is a porous material, it should be primed or primed before work. It is advisable to apply the primer in 2 layers.

Next, you need to properly dilute the glue. For a 30 kg package, take 15 liters of water (proportion – 2:1). It is imperative to add the powder to the water, but not vice versa, otherwise the lumps of the mixture will be impossible to break up. A precisely measured amount of water at room temperature is poured into a large container, then glue is poured in portions and mixed using a construction mixer or drill with a suitable attachment.

It is important that all tools and utensils, as well as water, are clean, otherwise the quality of the finished product will decrease. If the solution is too thick, you can dilute it a little more with water until you get the consistency of thick sour cream.

You should beat the solution until the lumps completely disappear so that the mass becomes homogeneous.

The thickness of the glue layer is about 2 cm. The solution is applied not continuously, but in a dotted manner - in sections every 2-4 cm, in rows in a checkerboard pattern. If the gypsum board sheet is thin (less than a centimeter), you can apply glue along the center line and along the edges, as well as diagonally. Thicker sheets require staggered application, but for their small size, 2 rows of adhesive spots are sufficient. Large sheets of plasterboard of great thickness are treated with glue, the same goes for the wall, then the material is immediately fixed in its place. After applying the gypsum board, you need to level the sheet using a level and strictly observing the possible adjustment time.

Storage conditions

The shelf life during which the manufacturer guarantees the high quality of the glue is 6 months. It must be stored in a dry place, despite the presence of several levels of protection in the packaging. The need to eliminate high humidity is associated with the presence of gypsum in the composition of Perlfix. When storing, it is best to place a pack of glue on a wooden pallet, this will help avoid the mixture from getting damp.

How to use

Before starting to work with Knauf Perlfix glue, you should determine its consumption on the desired surface. According to the instructions, the consumption of the mounting compound for drywall is 5 kg per 1 m² when treating gypsum plasterboard and gypsum board surfaces; in the case of working with PGP, the consumption will be 1.5 kg per 1 m². However, in practice, the consumption of the product may be slightly different, it all depends on the experience of the specialist. Professionals who have already become fairly experienced in installing tongue-and-groove tiles (GGP) apply a little diluted glue to the surface so that after laying the sheet on, a little product comes out of the joint. Beginners in the construction industry do not like to save the mixture, thinking that it is bad, and apply a lot of glue, which is why a large amount of excess composition remains.

Here you should take into account the fact that the work is done with gypsum, and not with ordinary glue or cement. If in the second case you can use a spatula to remove all the excess and put it back into the container, then in the first case you cannot do this, because the mixture collected from the plaster will greatly reduce the lifespan of the glue. It will simply dry out right in the bucket in about fifteen minutes, which will result in overspending. But thanks to the ease of use, you can quickly and easily learn exactly how much to prepare the mixture and apply it to the base being treated.

One of the main conditions when working with Perlfix glue is the temperature level, which should not be lower than +5 degrees. When working with a product weighing 30 kg, you will need 16 liters of water.

Work with Knauf Perlfix glue in the following order:

first you need to clean the wall from dirt, dust and detachments;
when working with gypsum plasterboard, the wall should be primed, preferably with a primer of the same brand as the plasterboard adhesive itself;
carry out the process of mixing the mixture, usually this is done in a plastic container;
the dry mixture is added to the water in a ratio of 1: 2;
It is recommended to stir with a construction mixer; the result should be a mixture without lumps, similar in thickness to sour cream;

If the glue is very thick or liquid, you need to add water or dry product accordingly. To avoid mistakes, professional craftsmen add the mixture gradually, stirring at the same time. This allows you to control the consistency of the glue;
You need to use the resulting mass within thirty minutes, so it is advisable to make small portions that will be used within this time;
It is recommended to apply Perlfix pointwise, making distances of 30–35 centimeters;
if the drywall is less than one centimeter thick, the glue is applied along the middle line in a row; when working with a thickened sheet, it is applied in two rows along the entire plane;
The sheet is carefully applied to the wall from bottom to top, and then leveled.

Knauf Perlfix adhesive has optimal ductility and adhesion to materials. It exhibits excellent properties when working with tongue-and-groove slabs and frameless cladding of bases. The affordable price of the product and large volume allow you to spend less money on repair work.

For information on how to properly glue drywall with Knauf Perlfix glue, see below.

Selection and Application

An informed choice of adhesive for a specific task can be made after preliminary verification of its characteristics and the conditions for further use of the glued products. The assessment is made according to the following criteria:

Parameters of humidity and temperature in the room where work will be carried out using Moment glue.
What materials will be combined, their structure and homogeneity.
Is Moment expected to come into contact with food?
Required tensile strength, seam elasticity.
What products will be joined, the size of the required seam (for thick seams, thick Moment adhesive compositions are better suited).
The ability of the resulting connection to withstand certain operational loads and impacts: shock, vibration, deformation, other mechanical loads, frost, heat, contact with water, aggressive substances.
No aggressive effect of the adhesive Moment on the material of the surfaces being joined.
What method is chosen for gluing - hot, cold.
The ability of the working composition to completely fill the voids of porous materials.

For each type of Moment rubber glue, instructions are provided on the packaging container for its correct and effective use. In a simplified version, the gluing technology consists of the following steps:

Thorough cleaning of contaminants on work surfaces, sanding (if necessary), degreasing.
Applying the composition to the surfaces to be bonded. If hot gluing is performed, the composition can be heated with a technical hair dryer. With the cold method of gluing rubber to plastic, the composition is first applied to the surface of the rubber product and left for 15-20 minutes, after which both surfaces to be joined are treated with glue.
Compress the parts tightly for a few minutes and, if possible, further install them under a press.

An interesting way to compress workpieces from a specialist:

The minimum layer of adhesive application Moment is 2 mm. For joining thin and elastic materials (for example, when repairing a rubber boat), a 1 mm seam is allowed. In this case, it is recommended to use gauze for reinforcement. The hardened seam will gain its maximum strength in 1-2 days.

Rules of application

When working, it is important to observe temperature intervals. For gluing you will need a trowel and a notched spatula.

Preparatory work

Before starting cladding you need:

cleaning from dust, dirt, old finishing materials, paint;
degreasing with solvents;
surface drying;
when laying a heated floor, turn it off a day before work;
primer treatment of highly absorbent substrates;
preventing contact with water, providing the necessary waterproofing.

Breeding rules

When diluting glue, you must use safety glasses and a respirator. Knauf is diluted in the following proportion: 1 glass of water is required for 1 kg of dry glue. First, the liquid is poured, after which the powder is added, the mass is kneaded with a construction mixer until a homogeneous solution is obtained. Cover the finished mixture with a lid for 5 minutes, after which it is mixed again.

How to work with glue

Take the glue with a trowel and place it on a spatula. Apply to the wall or floor, distribute the glue evenly over the surface, then run the teeth of a spatula over the adhesive layer. For exterior work, apply glue also to tiles. After this, apply the facing material and press it well to the base. Immediately wipe off the exposed layer of glue with a damp cloth. When working with glue, avoid direct sunlight and drafts. Work must be done with gloves.

Advantages and disadvantages of application

Perlfix glue has many advantages over other joining materials:

It's easy to work with.
Installation is silent.
Working with glue does not require special tools. The composition is applied with a ribbed spatula.
Compared to other materials, Perlfix is a fairly economical option.
Finishing is easier and faster than using a profile.
It is possible to level and strengthen the walls along the way.
Suitable for small putty work.

Perlfix glue has a number of disadvantages:

Duration of fixation – you have to wait a week for complete drying;
impossibility of continuing work until complete drying;
limited correction time.

If the glue has not had time to set, then work cannot be continued. This will cause cracks to appear. The master has no more than 10 minutes to adjust the blocks and slabs. Then the glue hardens and loses its elasticity.

It is unacceptable to use glue on damp walls. Do not allow direct moisture to come into contact with glue-coated materials.

Advantages and disadvantages

Knauf Perlfix glue has both a lot of advantages and some disadvantages that should definitely be taken into account when purchasing. One of its main advantages is the environmental purity of the mixture, as well as the absence of a toxic odor, which makes it safe for health. When using glue, repair work is much faster and easier. Due to the absence of the need to use a hammer or hammer drill to drive in nails and screws, your repair will be absolutely silent and economical, since you will not have to spend money on additional tools. The composition is applied with a special ribbed spatula either immediately to the entire surface or in cakes.

A huge advantage of the Knauf company itself is the availability of quality certificates for each of its products, which guarantees the high quality of all products, as well as careful control at different stages of production.

However, the adhesive mixture also has several disadvantages, one of which is the long drying time of a week. This characteristic is associated with the components that make up the Knauf adhesive. After drying, the glue becomes very strong and provides reliable fastening for many years. During this process, that is, all seven days, the composition will increase the level of strength and, as it were, shrink the material. During this period, it is necessary to postpone any putty work to prevent the appearance of cracks.

It is only ten minutes, and sometimes five. The glue loses its plasticity in a fairly short period of time, which is why any changes in the application of sheets, or the elimination of any bumps or pits that have appeared, must occur within a short period of time. After ten minutes, all your efforts will be in vain, as the mixture will no longer stretch. Despite such a rapid setting of the product, it will finally harden only after a week. The cost of this product is quite affordable and amounts to 300–350 rubles per bag.

Application

Gypsum adhesive KNAUF-PERLFIX is intended for gluing KNAUF plasterboard sheets (GKL), insulating materials (expanded polystyrene and mineral wool boards) onto brick, concrete, plastered wall bases with an uneven surface, for installation of gypsum tongue-and-groove slabs (GGP).

Used for interior work.

Advantages

Quick leveling of wall surfaces using KNAUF sheets without installing a supporting frame. — The use of KNAUF-Perlfix glue allows you to reduce the loss of room space when cladding walls. — The material is made from environmentally friendly natural mineral (gypsum) and does not contain substances harmful to human health.

Specifications

Consumption:

gluing gypsum boards: 5 kg/m2;
installation of GWP: 1.5 kg/m2.

Packaging: paper bag 30 kg.

Shelf life: 6 months in undamaged packaging.

Gypsum dry mixtures have different shades from white to gray and even pink. This is due to the presence of natural impurities in gypsum stone.

The color of the mixture does not affect its characteristics in any way.

Composition and technical characteristics

The basis of the glue is natural gypsum. Polymer materials are added to it, which determine the color of the mixture. Tinting does not affect the installation qualities of the mixture in any way. Glue consumption per 1 m2 does not depend on color. The adhesive composition has certificates confirming high quality standards. Perlfix gypsum adhesive produced by the Knauf production company has the following technical characteristics:

Increased adhesion – a high degree of adhesion of various materials.
Eco-friendly and hypoallergenic. There is not a single toxic substance among the ingredients.
The only purpose is interior decoration of residential and industrial premises.
Used in the temperature range: +5-30 degrees Celsius.
Can be used for puttying small cracks and potholes.
The shelf life of the finish is several decades.
Allows adjustment of fixed materials. The composition is elastic and gives stretch.
Setting time: 10 minutes.
The period of complete fixation is 7 days.
Neutral to mechanical stress. Withstands static, vibration and shock loads.

When using glue, there is no need for additional fixation with other fasteners. The adhesive composition retains its qualities for many years.

Surface preparation

To reduce the absorbency of the base and prevent uneven setting of the plaster mortar, gypsum and cement-lime plasters are treated with a primer diluted with water in a ratio of 1:3 or primer. Masonry made of gas, foam concrete blocks, ceramic or silicate bricks is primed using diluted water in a ratio of 1:2 or. Dense surfaces that do not absorb moisture, such as concrete, are treated with KNAUF-Betokontakt primer to improve the adhesion (adhesion) of the mounting mixture solution to the wall surface. After application, allow the primer to dry. Avoid dusting the primed surface.

The dry mixture is completely ready for use

Perlfix gypsum assembly adhesive is supplied in the form of a ready-to-use dry mixture. The use of additional components in its preparation is not required. So you should not add any substances to the solution yourself, as this may negatively affect the final properties of the mixture. If it is necessary to carry out repairs in non-standard conditions, the manufacturer also produces models other than the basic glue, which are specially adapted to special situations.

The applicability of the glue for other purposes should be checked with specialists or official representatives of the manufacturer. 24/7 technical support is available on the company's website. There you can also find phone numbers where you can communicate directly with the operator. Reading a thematic forum where people share their personal experiences and experiments carried out during repairs can also help resolve this issue.

It is best to purchase building materials from a certified point of sale. There is a guarantee of authenticity that cannot be given in a regular spontaneous market. The national average price for Perlfix glue is 300-350 rubles per bag. This is a very insignificant amount, considering the performance of the product. When purchasing a large quantity, you can get a good discount or negotiate with the store for free delivery to your desired location.

How to determine glue consumption

It is recommended to calculate the consumption of the product in advance to purchase the required volume of dry matter.
As a rule, about five kilograms of already diluted mass are consumed per square meter. But you should take into account factors that can change the consumption of glue (type of surface, its structure, quality, evenness, specialist skills).

Perlfix glue from Knauf: composition, advantages, application

Among the variety of construction adhesive mixtures, Perlfix adhesive from . The material meets the highest requirements. Its main purpose is to install drywall on various types of surfaces - concrete, brick, etc. Despite the long drying time, this adhesive is one of the best in strength among analogues.

Knauf is a company known for producing high-quality construction products. "Perlfix" glue is a dry mixture based on gypsum, improved with polymer additives. To prepare the solution, simply dilute the powder with water. Intended for gluing sheets of plasterboard, foam plastic, polystyrene and gypsum boards to various substrates, including uneven ones. Bags of mixture of 15 or 30 kg are available for sale.

Technical characteristics of gypsum glue:

Has increased adhesion.
Eco-friendly and safe composition for humans.
Intended for interior use only.
Used at temperatures from +5 to +30 degrees.
Can be used in unheated rooms.
Resistant to moisture. Withstands high humidity, suitable for finishing kitchens and bathrooms.
Suitable for small putty work.
The finish has a long shelf life—several decades.
It sets in 30 minutes and allows you to adjust the position of finishing materials. Complete drying occurs after 7 days.
Resistant to mechanical loads.
The shelf life of the composition is 6 months.
The average glue consumption per 1 m2 is 5 kg. The exact amount depends on the type and evenness of the surface.

Perlfix assembly adhesive is an excellent opportunity to save on repairs. Due to its strength, there is no need to use additional fasteners. The adhesive joint retains its properties for many years.

To dilute gypsum glue, take an average of 15-16 liters of water per bag (30 kg), that is, in a ratio of approximately 1:2. Any plastic container is suitable for preparing the mixture. First, water is poured into it, and only then the glue is poured in in a thin continuous stream and stirred with a construction mixer until it has a homogeneous consistency, without lumps.

Wall preparation is required before applying glue. They need to be cleaned of dirt and particles of old finishing and primed, regardless of type. The best installation result will be when using Knauf primer products.

Advice! The powder should be stored strictly in a dry and well-ventilated area, otherwise the glue will become damp due to the high gypsum content. If the packaging has been damaged, the mixture is poured into a whole bag and hermetically sealed.

Instructions for using ready-made Perlfix:

The glue is spread on the wall with a rubber notched trowel pointwise at intervals of 3-4 cm.
The glue is applied along the center line of the sheet in one row or in a checkerboard pattern. Recommended layer thickness is 2 cm.
For thick finishing materials, you will need two rows of glue, as well as additional processing around the perimeter.
Ready-made drywall adhesive is ready to use within 30 minutes. The powder should be diluted in the required quantity. You should not dilute old glue with water, as its quality becomes much worse.
The plasterboard sheet is tightly attached to the wall and leveled. It is better to make the correction in the first 10 minutes after gluing.
The finish should be left alone for 7 days until completely dry.

The use of Perlfix glue greatly facilitates installation work. This durable composition sets well, but allows for some time to adjust the position of the finish. Gypsum glue is an excellent alternative to screws and metal fasteners, which can damage the structure of drywall.

How to glue drywall with Perlfix

It is impossible to do without preliminary surface preparation. This stage is mandatory for any finishing work. They start by cleaning the walls from all types of possible contaminants; if there is old finishing material on them, then it should be carefully removed. The next step is to prime the surface; select compounds suitable for use under the adhesive.

It is recommended to choose products of the same brand. This helps to obtain a better result, because the manufacturer creates materials that are ideally suited to each other.

Knauf primers are produced in plastic buckets; these are ready-made solutions that do not require preliminary preparation. Application can be done using a roller or sprayer. Before using Perlfix glue, wait until the primer layer has completely dried.

Before using Perlfix glue, wait until the primer layer has completely dried.

The mixture must be diluted according to the manufacturer's instructions. The consistency should be a paste. Add 15-16 liters of cold water to a 30-kilogram bag. First, the required amount of water is collected into the container, then the powder is poured into it and mixed, it is advisable to use a construction mixer for this purpose. Stir until a paste-like mass is obtained. At the same time, make sure that there are no lumps left. Apply the resulting paste to the wall using a notched rubber spatula. The distribution is uniform, leaving an interval of 3-4 centimeters.

After application, it is carried out in the center of the drywall sheet. You can make a checkerboard distribution; the layer thickness should be 2 centimeters. If the size of the panels is large, then you will need to apply the paste in two layers. You also need to apply the compound around the perimeter.

Dilute the mixture with water in small portions; due to the short shelf life of the finished version, it is 30 minutes. Repeated introduction of water will reduce the quality of the resulting compound.

The plasterboard sheet must be firmly attached to the surface. There are 10 minutes left to level the position, so you need to try to do the work quickly. Then they work with the rest of the material using the same principle. The surface will have to dry for seven days; during this time, no other work can be done with the sheets so as not to disrupt the strength of the fixation.

If the size of the panels is large, then you will need to apply the paste in two layers.

Features of use, tips and recommendations

General recommendations for working with Perlfix glue were previously described, but repairs may differ. Glue can be used to glue not only drywall, but also blocks, polystyrene foam, plasterboard and more. Each type may have its own characteristics that should be taken into account during installation. Therefore, it is worth studying the recommendations of experts:

After priming, while the wall is drying, check to see if there is any dust or dirt on the surface. Their presence can lead to worse adhesion;
The container in which the composition will be prepared must be clean; it is better to rinse it in hot water. But diluting the glue is only permissible when cold. Moreover, the lower the temperature, the better; cold water helps to increase the time of use of the prepared solution;
The paste is applied pointwise, in the form of cakes. Start from the center of the block, moving to the edges, the entire perimeter should be filled with glue;
Tongue-and-groove slabs require the preparation of a more liquid solution, this will serve to reduce Perlfix glue residues in the joint areas;
Excess paste that has been removed cannot be returned to the total mass; it will reduce the quality of the entire solution. Thickening will occur faster;
When working with gypsum board, you can apply the composition with a notched trowel along the length of the sheet; you can also work with the wall. The thickness is determined by centimeter on the wall and panels. This technique allows you to obtain a uniform distribution; when the slab is applied to the wall, the glue will be distributed evenly over all gaps;
When buying Knauf products, you need to ask the seller for quality certificates; it has become popular to create counterfeits of this brand;
Temperature readings in the room where repairs are being carried out are recommended to be from +20 to +25 degrees.

Glue can be used to glue not only drywall, but also blocks, polystyrene foam, plasterboard and more.

How is it different from polyurethane foam?

Polyurethane foam or adhesive foam? It is difficult for an ignorant person to understand. To understand the difference between these materials, you need to compare them. Polyurethane foam is a polyurethane sealant. Purpose: installation. Additionally, it has sound-proofing and heat-insulating properties. Used when installing doors, sealing cracks, sealing seams. It can be used to fix building materials, but the expansion it gives when hardening makes fixation problematic.

Adhesive foam is a polyurethane adhesive. Its main function is to connect parts. It differs from polyurethane foam in its qualities. Its adhesive ability and adhesion are many times better than polyurethane foam. This is achieved through special additives. Foam adhesive does not expand. Its increase in volume is minimal. In order to evenly glue the panel to the wall with mounting foam, additional fixation is needed. Otherwise, the foam, expanding, will raise the slab. When working with foam adhesive, no fixing devices are required. The panel is simply applied to the wall and pressed.

General information about

This is a world-famous manufacturer producing construction products. Its materials are used for interior and exterior decoration, as well as for machine application.

The organization was created in 1932 in Germany by two brothers - Alfons and Karl Knauf. Their company has proven itself as a manufacturer of high-quality finishing materials. Nowadays it has achieved global leadership in the construction industry.

The first plant was opened in Bavaria in 1949. Initially, the company produced only gypsum mixtures, but from the beginning of 1958 it began producing plasterboard sheets. In order to finally gain a foothold in the market and expand the range of products, Knauf in 1970 acquired a stake in Deutsche Perlite GmbH (the company produced dry cement mixtures), and soon a plant for the production of fiberglass thermal insulation in Shelbyville (USA). This diversified risks and took the organization to a new level.

In 1993, it opened factories in the CIS countries. Today it is a successful company with a worldwide reputation for the production of high-quality and durable materials.

Glue analogues

There are similar products in stores that are practically no different in properties from Knauf Perlfix. The most popular of them:

ByProc – universal gypsum adhesive GKU-450. Used for interior work at normal and low air humidity. It is used for fastening gypsum plasterboard sheets, heat and sound insulation, mineral wool and polystyrene foam, gypsum fiber. The adhesive is also ideal for gluing stucco molding, a number of decorative materials and small tiles.
"Volma Montazh". This dry mixture provides high adhesion and long service life, allows you to attach gypsum elements, plasterboard, tongue-and-groove slabs, and thermal insulation sheets to walls. The mixture is characterized by low consumption - up to 2 kg per 1 sq. m, as well as the viability of the solution up to 1 hour.
Perel Gipsel - the adhesive is famous for its frost resistance, so it can be used in unheated rooms. The time for adjusting the position of the slabs glued to this product is only 5 minutes, so it will be quite difficult for a beginner to work with it.
"Osnovit" - installation adhesive "Gipsform MG". Used for fastening all types of gypsum boards and gypsum fiber, as well as expanded polystyrene. Produced in medium-sized bags – 20 kg each.

Properties and characteristics

The service life of the mixture is several decades. Perlfix glue, the characteristics of which are presented by the manufacturer, has good adhesion to the concrete base (0.6 MPa).

Due to the increased gypsum content, the mixture has increased compressive strength (10.9 MPa) and flexural strength (3.4 MPa). During operation, Perlfix glue sets within 30 minutes. This property allows you to make adjustments to drywall sheets using rules or a building level.

Seven days is the period for complete drying of Perlfix glue. The consumption of gypsum mounting mixture is 5 kg per 1 m2 of treated surface. To obtain high-quality and reliable results, it should be operated at a temperature not lower than +5 °C. Water consumption per bag (30 kg) is 16 liters.

Perlfix glue is an environmentally friendly and healthy material. It is packaged and marketed in paper packages of 15 and 30 kg.