Putty for drywall joints: which is better, which one to choose, manufacturers

When creating gypsum plasterboard structures, leveling ceilings and walls with the help of gypsum plasterboard, it is important to strictly follow the technology at all stages of work, from creating a framework to puttying the surface of sheets. Particular attention should be paid to the joints of drywall, since improper processing of joints will lead to further to the appearance of cracks in these places, the joints will be visible through the finish and repair will be spoiled. One of the important conditions for the correct processing of joints is the use of not a typical finishing putty, but a special putty for sealing drywall joints.

Types of putty mixtures

By purpose, putties are divided into several types:

• Starting - are used for preliminary alignment. The main requirements for them are high adhesion to the base, strength and durability.
• Finishing - applied under a decorative coating. With their help, the smallest defects are eliminated, which allows you to get a perfect smooth surface.
• Universal - it is advisable to apply to lovers when you need to level the surface with the help of one composition. There is no need to think about which putty to choose. Professionals prefer to use leveling compounds with subsequent finishing preparation.

Important! Conventional finishes and universal compounds are not suitable for grouting.

• Specialized - designed for specific purposes, for example, for sealing joints between drywall sheets. It is recommended to use drywall and putty mixture, which are produced by one manufacturer.

Important! If for some reason you do not have the opportunity to use special putty for sealing joints between gypsum plaster, the use of a high-quality starting composition is allowed.

Putties for joints of well-known manufacturers

The complexity of the choice of putty is associated with a large variety and excess of advertising. It is advisable to systematize brands in order to choose the right composition in accordance with the requirements and financial capabilities.

Specialty putties for jointing are produced in the form of dry mixes. They are stored in bags for a long time and prepared only before use.

Knauf Fugen

Relative inexpensive putty, which allows to solve many problems in the decoration of premises.

Composition "Knauf Fugen"(The old name -" Fugenfyuller ") is considered a putty, but can act as an adhesive repair mixture. It was developed specifically for sealing joints between sheets of drywall, but soon began to be used for it. gluing on walls, repairing drywall damage, installing corners, thin-layer puttying and other types works.

It should be borne in mind that the Fugen putty is quick-drying and it is advisable to prepare it in small portions.

Technical characteristics of Knauf Fugen putty:

• Composition - gypsum with additives to increase ductility and slow setting.
• It has a fine-grained structure with fractions up to 0.15 mm.
• The thickness of the applied layer is 1-3 mm. When sealing joints, putty is applied twice.
• Does not crack and does not shrink.

To prepare a composition for sealing joints and hats of self-tapping screws, a dry mixture is taken in an amount of 250 g and diluted with water. This amount is enough for 1 square. m of the treated surface.

There are 3 varieties of this mixture:

• universal;
• "Fugen GV" - is intended for sealing joints between gypsum-fiber sheets;
• Fugen Hudro is a moisture-resistant variety suitable for use with moisture-proof drywall and additional protection for joints.

Putty putty in 2 layers:

• Before applying the solution, the surface is primed.
• The reinforcing mesh-serpyanka and whether the paper tape is superimposed on the first layer and pressed in with a spatula.
• The second layer is applied to a dried surface.

Attention! Ready solution should be used in 30–40 minutes.

Knauf Uniflot

Putty “Knauf Uniflot” is a specialized super-strong waterproof mixture for plasterboard joints, surpassing all analogues in its properties.

• The increased strength brings it to the same level with the cement composition, however, the putty under consideration significantly exceeds its plasticity.
• Good adhesion, which brings this type of putty closer to synthetic glue, makes it possible to close GKL joints with a semicircular, thinned edge (PLUK) without the use of reinforcing tape.
• The composition does not shrink and does not crack.
• Perfect for sealing the most problematic transverse joints between GCR.
• Suitable for rooms with any humidity. Despite the fact that the basis of the mixture is gypsum, putty after drying does not absorb water, acquiring hydrophobic properties.

The color of the powder can vary from snow-white to gray and even pink: this factor is associated with the place of extraction of gypsum and does not affect the quality of the mixture.

Putty “Knauf Uniflot” is designed to work no longer than 25-30 minutes. After this, the solution solidifies. Frozen putty forms a strong coating, and it is difficult to sand it with sandpaper. The composition should be applied without calculating the shrinkage, since then the protrusions will have to grind for a long time.

Work order:

• joints are filled, the composition is pressed with a spatula 150 mm wide;
• after 50 minutes, excess material is removed, the surface is smoothed with fresh putty;
• recesses from screws are also processed in 2 passes.

When self-chamfering at joints, reinforcing paper tape should be used, as for other compounds.

The high cost of Knauf Uniflot putty mix is ​​offset by the quality of the material. In addition, the sealed seam does not require high consumption.

Volma Shov

The dry solution contains gypsum as a base, enriched with mineral and chemical fillers. Putty has a good grip. The working time of the diluted solution is 40 minutes

Appointment:

• sealing joints GKL and GVL;
• elimination of cracks and potholes;
• elimination of microroughnesses and obtaining a glossy surface.

Work Rules:

• the joint is primed;
• then the first layer of putty is applied and the reinforcing tape is pressed;
• after hardening, a second layer is applied;
• after solidification it should be ground, for which a grater with a mesh is used.

The material is suitable for application on the entire plane of the sheet. A small grain size requires the application of a finishing layer in the future.

GENERAL PG 35 MW

Dry gypsum mixture with additives. Before use, the base should be primed, otherwise the layer settles. The solution retains its working properties for 2 hours. After solidification, cracks do not form. Putty is intended for dry rooms. The dry mixture is stored for 6 months.

Conclusion

When choosing a putty for drywall joints, you need to focus on the conditions of use, your skills and expected costs. In some cases, the composition of gypsum is well suited, in others it is waterproof. If you plan to solve a wide range of problems, it makes sense to choose the “Fugen” from KNAUF, if you are betting on quality and durability, it is better to purchase “Uniflot”.