MASTERTOP P 617 | Primer for industrial floors

Directions for use

Foundation Requirements

• MasterTop P 617 is used in MasterTop flooring systems on almost all types of mineral substrates.

• The most common types are: new or old concrete bases, self- leveling cement masses, as well as specialized cement repair compounds, such as MasterEmaco.

• Work on the installation of a polymer coating using MasterTop P 617 on traditional concrete must be carried out no earlier than the base reaches 70% of its grade strength, primary shrinkage is completed and its mass moisture content will not exceed 4% (as a rule, this occurs 28 days after styling).

• During this time, the base needs some care, which consists in ensuring the temperature and humidity conditions of exposure. 

• Traditional concrete care methods are recommended.

• If various care products (curings) are used, they must be completely removed as part of the preparation of the substrate; 

• Substrate moisture must be determined using a dielcometric moisture meter or using the CM method (carbide). 

• In the design of the base of the concrete floor, on the ground, a waterproofing layer must be provided and of high quality . 

• This is also necessary in the construction of the base on the floor slab, when damp processes or temperature changes take place in the lower rooms.

• Capillary rise of moisture in the bases is unacceptable - this can lead to delamination of the polymer coating.

• All contaminants such as cement laitance, oil stains, traces of rubber, various putties and paints must be completely removed, as they affect the adhesion of the material to concrete. 

• The compressive strength of the base must be at least 20 MPa, and the cohesive strength (peel) at least 1.5 MPa. 

• These parameters are most conveniently determined using a sclerometer (or Schmidt hammer) and an adhesive meter (for example, PSO-5MG4).

• The evenness of the base is determined by the requirements and operating conditions. 

• Also, the allowable values ​​depend on the selected polymer coating system.

• As a rule, the horizontal deviation in evenness should not exceed 4 mm per 2 m for standard conditions and 2 mm per 2 m for coatings with increased requirements for evenness (according to SP 29.13330.2011 "FLOORS"). 

• Measurements are made using a 2 m rail or rule.

• The base before applying coatings should not have cracks, voids, delaminations and weakened fragile areas.

• All such defects must be pre-repaired. 

• The choice of materials and repair technologies depends on the types of existing defects, the design of the base and the planned operational loads. 

• For more detailed information on this section, please contact FLOORTOP specialists.

Foundation preparation

• Mechanical preparation of the base is used not only to remove contaminants and open pores, but also to increase the adhesion of the polymer coating. 

• The more textured the surface obtained as a result of processing, the higher the adhesion of the coating, and, consequently, its higher resistance to dynamic loads and longer service life.

• The most optimal method of preparing the base is selected depending on its condition, design, existing defects, expected operational impacts and the selected polymer coating system;

• The best preparation method for floors subjected to significant dynamic loads, chemicals or temperature changes is milling or shot blasting. 

• In some cases, this type of base preparation will require additional filling before applying the main layers of the coating;

• The most common type of base preparation is grinding. 

• When using this method of preparation, it is recommended to use diamond abrasive elements of larger size. 

• The result of processing should be a well-textured surface, it is desirable that after processing it opens (becomes visible), mineral aggregate (crushed stone, coarse sand);

• After processing, the base must be carefully dedusted with an industrial vacuum cleaner;

•  It is not allowed to use water in the process of processing and cleaning the base.

Application conditions

• The temperature of the base during the application of the material should be from +8°С to +30°С. 

• It must be remembered that sometimes the temperature of the base can be lower than the air temperature by 3-4°C. 

• It is highly undesirable to have areas with a large difference in base temperature within the same working area. 

• This can be caused by various factors, such as sunlight, various equipment in the room, temperature processes in adjacent rooms, etc. 

• The base temperature is most easily measured with a pyrometer (non-contact infrared thermometer).

• The substrate temperature must be 3ºC above the dew point. 

• The "dew point" is the air temperature at which condensation forms in a room. 

• It depends on the air humidity in the room and is determined according to the calculation table (see Appendix "Dew Point Calculation Table").

• The air temperature at the construction site should be from +8°С to +30°С.

• The presence of drafts is highly undesirable - this can lead to surface defects: bubbles, ripples, shagreen, sticky areas. 

• Air humidity at the facility should be no more than 85% at temperatures above +23°C and no more than 75% at +10°C. 

• Humidity and air temperature are best measured with a thermohygrometer;

• The temperature of the material components should be around +20°C. 

• At a high temperature on the object, it is desirable to have a material temperature of about +15°C, and at a low temperature on the object, on the contrary, it is desirable to have a material temperature of about +25°C. 

• The temperature of the material and base, humidity and air temperature directly affect such material properties as viscosity (fluidity), pot life, polymerization time, surface appearance and the presence/absence of various defects.

Material preparation

• MasterTop P 617 consists of two components: "A" - epoxy resin (12.6 kg) and "B" - hardener (5.4 kg), which are in a carefully selected ratio.

• If it is necessary to partially use the kit, the mass ratio of the components must be strictly observed (before weighing, the components must be mixed independently of each other). 

• If this rule is not observed, the appearance of a greasy film on the surface, residual stickiness or loss of the physical and mechanical properties of the layer is possible.

• Open the containers with the components and thoroughly mix the component "A" (resin) in the original packaging, using a low-speed mixer with a spiral attachment of the "Helical" type (300 - 400 rpm).

• Completely pour component "B" (hardener) into the container of component "A" (resin) and mix thoroughly for 2 - 3 minutes until a homogeneous material consistency is obtained. 

• In this case, the areas adjacent to the bottom and to the edges of the mixing container should be captured.

• Pour the material into a second, clean container and mix again for 1 to 2 minutes.

• If necessary, quartz sands and other fillers are added to the pre-mixed binder with constant stirring. 

• Stir until a homogeneous mixture is obtained.

• When mixing the components, the mixer nozzle should not rise much above the level of the material, so as not to involve excess air in the composition.

• The chemical reaction between components "A" and "B" is exothermic, that is, it occurs with the release of heat, which reduces the lifetime of the composition, so the volume of the mixed material must be linked to the number of stackers, the speed and method of application, and the temperature at the object.

• Each minute of the presence of a mixed set of material ("A" + "B") in a large volume (in a bucket) reduces the lifetime and, consequently, the processing time of the material. 

• Try to knead such an amount of the composition that the production time for one batch is about 15 - 20 minutes.

Material application

• MasterTop P 617 is applied to the substrate using the “painting” method using a synthetic bristle roller. 

• In some cases (for example, a highly porous base), it is advisable to apply the composition using a rubber squeegee, followed by rolling with a roller. 

• In the process of applying the primer composition, avoid the formation of puddles and streaks.

• The primer layer must be applied evenly. 

• The application of the material should be started from the wall opposite the exit. 

• In rooms with complex geometry, we recommend that you think over the schedule and work plan for pouring in advance.

• If the first primer coat is completely or partially absorbed into the base, it is necessary to apply the material again. 

• To save material, re-applying the primer should be done after the first layer has cured (the time for layer curing depends on the temperature conditions at the site). 

• The total consumption of material for the primer of the base depends on the porosity and texture of the surface. 

• After application, the material must be protected from direct exposure to water for 24 hours (at 20°C).

• During this period of time, exposure to water may cause white discoloration and/or surface tackiness on the surface, which greatly affects the adhesion of the subsequent coating and must be removed. 

• Before applying the base coats, a properly primed substrate surface should look like damp concrete without dry or dull spots, with a clearly visible polymer film. 

• The primed surface must not be sticky, there must be no puddles or thick layers of material on it, as well as visually visible pores.

Consumption

• 0.3-0.5 kg/m/sq.

• Sand 0.3-0.8 mm: 1 kg/m/sq.

Cleaning tools

• After completion of work, the tools are cleaned with an organic solvent. 

• Cured material can only be removed mechanically.

Security measures

• When working with the material, it is necessary to ensure ventilation of the room; 

• When working, it is necessary to use special clothes and shoes, goggles and gloves; 

• Do not allow material to come into contact with exposed skin; 

• In case of contact with eyes or mouth, rinse with plenty of water and seek medical advice immediately.