Sikagard® H 400

Alberta DOT, Type 1b

Water-based alkylalkoxysilane

40 %

18 months when properly stored in original, unopened packaging

Store in unopened containers in a clean, dry area between 2 °C and 43 °C (35 °F and 110 °F). Protect from freezing.

7.9 lb/US gal.

Specific gravity: 0.95 at 25 °C (77 °F)

40 %

6.1 mm (0.24 in), average depth depending upon substrate

Water weight gain

Note: Test results are averages obtained at a coverage rate of 3.12 m²/3.8 L (125 ft²/US gal.) under laboratory conditions. Reasonable variations can be expected.

4 hours (typically)

Note: Cooler temperatures or higher relative humidity can extend the drying time.

• Concrete: 2.4–4.8 m²/L (100–200 ft²/US gal.)
• Brick: 2.4–4.8 m²/L (100–200 ft²/US gal.)

Note: Always apply a test area to determine actual coverage rates. Coverage rates will vary greatly with the porosity of the substrate.

Verify substrate has properly cured. Concrete should obtain 80 % of design strength, typically achieved within 14–28 days. Clean concrete surfaces of all sand, surface dust and dirt, oil, grease, chemical films, coatings, and other contaminants prior to application. Power wash, sandblast, or shotblast as necessary to achieve the desired surface condition. Surface, air, and material temperatures should be 4 °C to 43 °C (40 °F to 110 °F) during application.

Do not apply when temperatures are expected to fall below 4 °C (40 °F)  within 12 hours. A dry surface is suggested for maximum penetration of sealer; however, surfaces to be treated can be slightly damp. Do not apply if standing water is visible on the surface to be treated. Crack control, caulking, patching, and expansion joint sealants can be installed before or after the application of the sealer. Allow a minimum of 6–12 hours of curing time for caulking and sealant materials (or until they have skinned over) before applying Sikagard® H 400. Following the application, remove the excess product that might pond on a concave sealant joint.

Test a small area of the surface, generally a 1.5 m x 1.5 m (5 ft x 5 ft) section before starting the general application of any clear penetrating sealer to ensure desired performance results, aesthetics, and coverage rates. Allow 5–7 days for the product to fully react before evaluation.

Stir material thoroughly before and during application. Apply to saturation. Apply by low-pressure non-atomizing spray or, if desired on horizontal surfaces, by pouring, followed by a squeegee or a broom for even distribution.

Clean equipment and tools with hot soapy water. Overspray can be cleaned immediately with hot soapy water. Dried residue can be cleaned with a mild citrus-based cleaner or very hot water, then scrubbed with a soft-bristle brush.