Het Acrylic Sealant for Gypsum Board, Masonry and Plasters, 400 g

Het Acrylic Sealant for level surface finishing of walls (plasters, masonry, panels, gypsum board, etc.) in interiors. Interior finishing leveling sealant for manual application on construction materials, especially mineral walls. It is used to level small imperfections in walls (plasters, masonry, panels, gypsum board, etc.) or for minor repairs. The sealant is ready for immediate use, has thixotropic properties, is vapor-permeable, very easy to sand, and can achieve very smooth surfaces. The product meets the requirements for surfaces that may come into indirect contact with food. It is not recommended for jointing and in areas with high mechanical or thermal stress. It is not suitable as a substrate for mineral or polymer plasters. Sealed areas must not be in contact with water and rising moisture.

Properties of Het Acrylic Sealant for Gypsum Board, Masonry and Plasters:

• Ready for immediate use,
• thixotropic properties,
• very good sandability,
• vapor-permeable.

Shade:
non-standard white.

Coverage:
Approximately 0.3 to 1 m²/1 kg of sealant in one layer. The coverage may vary depending on the thickness of the applied layer, substrate structure, application technique, and other factors. The exact coverage for a specific substrate must be determined on a test area. Consumption: 1 - 3 kg/m² in one layer (depending on the type of substrate).

Drying time:
min. 4 - 24 hours at 20 °C and 60% relative air humidity.

Storage:
24 months from the date of manufacture in the original unopened container, at a temperature of +3 to +30 °C, must not freeze, protect from direct sunlight.

Substrate:
dry, mature (pH ≤8.5; check can be done with a pH tester), cohesive, not salt-laden, solid, degreased, free of dust, dirt, and non-cohesive layers, without dynamic cracks and joints, free from biological infestation (mold, algae). Layers of old coatings with insufficient adhesion must be removed, e.g., by scraping. For plasters, remove loose sand grains (by sanding and/or sweeping). To improve the adhesion of the sealant to the substrate, it is
recommended to apply a primer. Metal elements that penetrate the surface being treated must be coated with an anti-corrosive paint before sealing.

Application temperature:
the temperature of the material, the environment, and the substrate must be between +5 and +30 °C (better +8 to +25 °C) during application and for 24 hours (preferably 48 hours) after application.

Example of application procedure:

1. cover windows, radiators, door frames, etc.
2. before applying the sealant, any dried material from the sealant packaging must be removed.
3. layers of old coatings with insufficient adhesion must be removed, e.g., by scraping.
4. apply a primer. For less absorbent and/or extremely smooth substrates (gypsum board, gypsum plaster, cement-polymer plaster, etc.), the primer is applied with the primer UP-GRUND, for more absorbent substrates (lime or lime-cement plaster, masonry, etc.) use the products A-GRUND, 100-GRUND, or AT-GRUND according to the instructions for use.
5. after the primer has completely dried, apply the ACRYLIC SEALANT with a stainless steel trowel (small areas with a steel spatula). The recommended thickness of one layer is 1 mm, the maximum permitted thickness of one layer is 2 mm.
6. allow the sealant to dry until fully cured (approximately 4 to 24 hours or longer, drying time highly depends on the thickness of the layers, absorbency of the substrate, temperature, and humidity).
7. it is advisable to sand the sealed areas after drying with sanding mesh or fine sandpaper on a firm backing.
8. if necessary, additional layers of sealant can be applied and each time after drying, sand again. The total thickness of the layers should not exceed 4 mm to avoid the risk of cracking.
9. after sanding, dust must be removed from the sanded areas.
10. tools and contaminated areas should be washed immediately with water.
11. before painting, it is recommended to re-prime the sealed areas with, for example, UP-GRUND, AGRUND, AT-GRUND, or 100-GRUND.
12. then it is possible to apply dispersion paints to the surfaces, such as products from the KLASIK, HETLINE, or BRILLANT range. It is not advisable to use lime paints or paints without sufficient content of dispersion binder on sealed surfaces.