Primer frost resistance. What is the best deep penetration primer for concrete treatment? Packing and storage

ST 17 deep penetration frost-resistant primer CERESIT, 10l- universal primer

Properties:

"winter" (frost-resistant) and "summer" versions of the primer are produced;
strengthens the surface of the base;
increases adhesion to the base;
reduces the absorbency of the base;
has a high penetrating power;
does not reduce the vapor permeability of the base;
can be used on heated screeds;
suitable for indoor and outdoor use;
does not contain solvents;
environmentally safe.

Application area:

Primer Ceresit CT 17 is intended for surface preparation before laying ceramic tiles, laying leveling compounds for the floor, fastening heat-insulating boards, painting, etc. in order to strengthen and reduce the absorbency of the base.

Ceresit CT 17 is used to treat walls and floors in interior and exterior applications.

Ceresit CT 17 penetrates deep into the surface layers of the base, increases their strength and wear resistance, binds dust and reduces absorbency. The surface primer prevents the mortar mixtures from drying out in a thin layer, which ensures the achievement of the greatest strength of the mortar, increases the adhesion of materials to the base, reduces cracking in the laid leveling masses, etc.

Ceresit CT 17 is used on such typical substrates as various kinds of plaster coatings, concrete, cement-sand screeds. The primer is suitable for compact, smooth concrete and existing ceramic or stone claddings.

Ceresit CT 17 is successfully used for processing cellular concrete (foam and aerated concrete); gypsum plasters; anhydrite screeds; chipboard and gypsum boards.

Foundation preparation:

The base must comply with the requirements of SNiP 3.04.01-87.

The base must be level, dry and strong enough. Its surface must be cleaned of all kinds of contaminants (dust, grease, lubricating oils, bituminous mastics, paint coatings, etc.).

Loose areas of the surface must be carefully swept. Defective, weak and flaking areas of the surface should be removed and the surface repaired. Paint coatings with low adhesion must be completely removed.

Windows, doors and other structural elements, as well as adjacent surfaces that cannot be processed, must be covered with a film or paper to protect them from contamination with a primer.

Execution of works:

The primer must be properly mixed before use.

Primer Ceresit CT 17 is applied to the substrate without diluting, using a brush or brush.

When treating highly absorbent substrates and anhydrite floors, the primer is applied in two working passes, the first pass using a primer diluted 1:1 with water.

Further finishing work can be carried out only after the primer has completely dried (4-6 hours after application, depending on the drying conditions).

Tools should be washed with water immediately after use. Dried material residues can only be removed with a solvent.

Note:

Works should be carried out in dry conditions, at air and substrate temperatures from +5 to +35°C and relative air humidity not more than 80%. All quality indicators and recommendations stated in the technical description are correct at an ambient temperature of +20°C and a relative humidity of 60%. In other conditions, it is possible to change the drying time of the primer.

The primer causes a slight discoloration of the treated substrate (slight yellowing), which helps to distinguish the treated surface from the untreated.

In addition to this technical description, when working with impregnation, one should be guided by SNiP 3.04.01-87, as well as general instructions for performing construction work.

The specifications given are based on practical experience and performance tests.

The manufacturer is not responsible for non-compliance with the technology when working with the material, as well as for its use for purposes and conditions not provided for in this technical description.

If in doubt about the applicability of the material, you should test it yourself or consult the manufacturer.

This technical description, as well as recommendations not confirmed in writing, cannot serve as a basis for the unconditional liability of the manufacturer.

With the advent of this technical description, all previous ones become invalid.

Shelf life:

In a cool and dry place, on pallets, in original undamaged packaging - no more than 12 months from the date of manufacture.

Protect from freezing!

Package:

Primer Ceresit CT 17 is supplied in cans of 10 liters.

Specifications:

Composition of Ceresit CT 17: water dispersion of polymers
Color: light yellow
Density: approx. 1.0 kg/dm²
Application temperature: from +5 to +35°С
Drying time: 4 - 6 hours (depending on drying conditions)
Viscosity: 10.5±1.0s
Water vapor diffusion resistance coefficient, µ H2O: approx. 100
Consumption of Ceresit CT 13: 0.1 - 0.2 l/m² (depending on the absorbency of the substrate)

A decent quality finish can only be achieved through careful surface preparation. And its final stage should be the application of soil. Depending on the base material and the characteristics of the subsequent layers, it is necessary to select compositions with suitable properties for this work. In the case of concrete that is porous and not very friendly to many mixtures, a deep penetration primer will be needed.

If you are not sure that the finish will adhere to the concrete, the solution is to improve the adhesion of the substrate itself. Especially if the monolith is not compacted and has many pores on the surface. Here you need a good primer that can penetrate deep into the stone, sealing all the channels, and reduce its absorbency. Otherwise, it will draw water out of the plaster or adhesive mixture, preventing them from gaining strength properly.

Such treatment of moderately and highly absorbent concrete substrates significantly reduces the consumption of finishing compounds. At the same time, the adhesion of the surface with the solutions applied to it also becomes better. Simply put, the plaster will not crumble, the tiles will not fall behind, and the paint on the walls will lie in a continuous and even layer.

Also, the primer for exterior and interior works protects the concrete itself from excess moisture, which is destructive for it. But it practically does not affect the vapor permeability of the walls. In some cases, the primer even goes as a full-fledged, albeit not very aesthetic, coating. They are simply treated with cement floors, screeds and fences for surface hardening and additional weather resistance.

Sometimes a deep penetration primer is also needed to create an intermediate layer between materials of different chemical composition. For example, gypsum, with its slightly acidic environment, can react with alkaline cement. To prevent this from happening, builders use Concrete-Contact or other soils as a separator, giving a continuous film on the main surface.

Types and characteristics

Traditionally, deep penetrating compounds are made on the basis of acrylic. These mixtures dry quickly enough so that further work can be started a maximum of 3 hours after their application. They do not repel pungent odors and do not contain harmful volatile substances, so acrylic solutions are freely used even in poorly ventilated areas.

Popular brands and their characteristics:

• Ceresit CT 17.

The concentrate is produced in two modifications: the so-called summer and frost-resistant primer for concrete for outdoor use. The ST-17 composition can be used for any surfaces: walls, cement screed, fences and facades. With a density of 1 kg / l, it penetrates about 5 mm into the thickness of the M300 stone, although the consumption is relatively small: a liter is enough to process 5-10 squares. Nevertheless, Ceresit CT 17 is better to choose for finishing tiles or porcelain tiles, as it gives a very strong film with good adhesion.

• Optimist G101.

The most affordable primer also includes antiseptic and hardening additives. The consumption here is already more than that of Ceresit: a liter of the mixture is enough for only 4 m2, since it is absorbed very easily. The penetration depth, depending on the brand of concrete, can vary within 1-5 mm.

• Prospectors.

A relatively inexpensive deep penetration primer of this brand is used in cases where it is necessary to further strengthen the weak concrete surface. In parallel, it improves the adhesive properties of the substrate. Consumption - 0.2 l / m2, frost resistance - up to 5 cycles.

• Knauf Tiefengrund.

It is considered a universal composition that is suitable for any subsequent concrete finishing (for example, for). Knauf deep penetration is ideal for super-absorbent bases like foam blocks, while it has a minimum consumption of 0.07-0.1 kg / m2.

The introduction of latex in the form of the smallest particles into acrylic primers makes it possible to create an ultra-thin water-repellent layer on concrete, which even has some frost resistance (from 5 cycles). Such impregnations are best used for external processing of facades, as well as walls in wet rooms.

Polyurethane primer

It can be chosen to protect, reinforce and prepare for the subsequent finishing of cementitious floors. Such compositions always have a strengthening effect on the upper layers of a dusty monolith and at the same time work as a waterproofing. However, they are also quite expensive. But the use of PU primers remains mandatory in preparation for painting or installing self-leveling floors.

They contain the smallest insoluble particles that seal the pores, thanks to which, for viscous and liquid finishing mixtures, it is possible to reduce consumption by 1 m2. In addition, one-component polyurethane impregnations, unlike conventional penetrating ones, strengthen not only porous, but also loose, dusty surfaces.

Characteristics of polyurethane compositions:

• Polybetol-Grunt.

Almost the only one is odorless and creates a matte water-repellent film on the concrete surface. Well strengthens the base, making it more resistant to abrasion, chemical and weathering. Consumption per square meter - 0.1-0.15 kg.

• Politek PU 0311.

Due to its particularly deep penetration, it perfectly fills the pores and cracks in concrete, improves the adhesion of the base with finishing materials, forming a sticky glossy film on the surface. Politek contains caustic solvents, so it must be handled outdoors or in well-ventilated areas. The density of the mixture is 0.97 kg / l, the consumption when applying the base layer is 0.25-0.5 kg / m2, the second layer is 0.15-0.2 kg / m2.

• Elacor PU.

The deep penetration primer seeps into the M300 to a depth of 2-4 mm. It can also be bought as an independent coating, because after hardening it turns into a durable film that is resistant to impact and abrasion. PU-primer has excellent characteristics: it is resistant to salts, fuels and lubricants, concentrated alkalis and acidic environments, has a wide operating temperature range: -60 - +120 °C. At the same time, Elakor strengthens the surface of the cement floor, bringing its grade up to M600. Consumption for each layer reaches 0.1-0.25 kg/m2.

Primer Concrete-Contact

Such compositions are usually considered separately, since they are already a kind of suspension of liquid glue and fine quartz sand. These mixtures solve a number of problems at once:

1. They clog the smallest pores of concrete, thereby protecting the surface from moisture penetration.

2. They form a sticky film that improves the adhesive properties of the monolith and separates layers that are incompatible with each other.

3. They create a rough surface for which plaster compositions cling perfectly.

Almost every manufacturer of leveling and finishing compounds can choose similar products. But it is simply impossible to unequivocally answer the question of which primer is better. While this material is relatively new on our market, the quality of all is kept at about the same level:

• Concrete-Contact.

The composition on acrylic resins is produced by the domestic company Lakra. It has a density of 1.3 kg/l and a fairly high flow rate of about 300 g/m2, partly due to deep penetration, but mainly due to the weight of the sand. The application of Lacra primer is recommended at +12°C and above, although after hardening it acquires frost resistance properties corresponding to F5.

• Knauf Betokontakt.

Alkali-resistant slurry can be purchased to treat concrete and generally any substrate that needs to be strengthened and improved adhesion. The only limitation of its use is frozen surfaces. Consumption varies depending on the method of application (270-350 g/m2). Complete drying occurs within 6 hours, after which the film acquires good adhesion and water-repellent properties.

• Ceresit CT 19.

Suitable only for dense substrates such as mineral plaster. However, it also adheres perfectly to any non-absorbent surfaces - even old tiles and hardened concrete. The density of the mixture is 1.5 kg/l, the consumption is 0.3-0.75 kg/m2.

Application rules

A deep penetration primer is applied only after careful preparation of the base, when all traces of the old finish are removed as far as possible, and the surface is cleaned of dust and repaired in places of the largest cracks. Liquid formulations are usually already sold ready-made, dry and concentrated (for example, Ceresit CT 17), as a rule, are first diluted with water.

When working with mixtures such as Concrete-contact, it is important to constantly mix them thoroughly so that sand does not settle at the bottom of the tank. The application is carried out with a roller, but on complex surfaces with small defects it is better to work with a brush. On large areas, it even makes sense to use an airbrush, for which the manufacturers themselves often advise adding about 5% of water, otherwise the mixture will get stuck in the nozzles and hoses.

Be sure to ensure that the primer for concrete is evenly distributed over the surface and laid down in a continuous layer. After painting or spraying, any composition must be allowed to dry completely (sufficient time for this is indicated on the label, but you can be guided by the color change). On weak and crumbling bases, the procedure is repeated.

All works are carried out at a temperature of +5-25 °C. At the same time, it is desirable to maintain air humidity not higher than 65%, otherwise the deep penetration primer will begin to foam right during the application process. This does not apply only to polyurethane compounds, which are cured just due to suspended vapor.

Price

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Forbo 078 universal frost-resistant water-soluble primer is a concentrated viscous liquid that improves the adhesion of building materials to each other and reduces the absorbency of porous surfaces.

Advantages of frost-resistant soil:

1. does not lose properties after freezing / thawing, which simplifies the process of its transportation and storage;
2. frost-resistant soil forms a reliable bond between the layers of building materials;
3. ensures good spreadability of self-leveling floor compounds;
4. increases the mechanical strength of concrete by clogging surface pores;
5. prevents the penetration of moisture and other substances into the screed, while not preventing it from "breathing";
6. does not contain toxic solvents, which makes Forbo 078 primer safe both during application and further use in residential premises;
7. when processing surfaces with low absorbency, it provides a more economical consumption of Knauf primer;
8. fast drying allows you to resume work after 2-4 hours.

Frost-resistant soil - scope

• Preparing the subfloor or walls for finishing work.
• Creating an insulating layer between incompatible surfaces or materials.
• Preparation of the subfloor for the installation of concrete, anhydrite or cement screeds.
• Preservation of strength characteristics and additional protection of treated surfaces, filling of external pores in concrete.
• Dust removal of poorly made screeds.

Concrete, when solidified, forms small pores on the surface, which over time will begin to collapse and gradually weaken the entire structure. At the same time, it has insufficient adhesion to a number of building mixtures, adhesives and finishing materials. Frost-resistant primer Forbo for walls will ensure the durability of concrete structures and significantly expand the possibilities of their finishing.

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