Sika Thorocoat®-400

• Alberta Transportation - Type 3 sealer

18 months when properly stored in original, unopened packaging

Store in unopened containers in a clean, dry area. Keep from freezing

Fungus Resistance

Mildew Resistance

Algae Resistance

Accelerated Weathering

Chalking

Sand Abrasion Resistance

Dirt Pick-up

6 hours minimum before recoating

 1–2 hours (dry to touch)
Note: Lower surface or air temperatures and higher relative humidity will extend the drying time.

*Coverages are estimates for smooth, dense concrete. Coverages will vary on porous or textured surfaces.

Apply a 1.2 x 1.2 m (4 x 4 ft) test area to verify acceptable colour, texture, and adhesion before proceeding with any project. The test method for measuring adhesion is ASTM D3359, Measuring Adhesion by Tape Method A. On the 0–5 scale, a minimum adhesion rating of 4A is required.

Surfaces should be clean and sound and free of all bond-inhibiting contaminants. Concrete substrates should be fully cured. Repair any holes, spalled and damaged concrete with appropriate Sika® repair materials. Allow appropriate cure time prior to coating. Remove any protruding concrete accessories and smooth out any surface irregularities. High-pressure power wash surface (or abrasive blast on hard, dense surfaces) to create a profile of SP 3, per ICRI Guide 310.2. Some stains may require chemical removal. Neutralize any cleaning compounds used and rinse with clean water. Check the adhesion of old coatings according to ASTM D3359, Measuring Adhesion by Tape Test Method A. Remove any blisters or delaminated areas and sand edges to smooth rough areas and provide a transition to old paint areas. Treat cracks greater than 0.8 mm (1⁄32 in) with Sika Thorocoat®-746 Knife Grade or SikaWall® FL 748. Treat cracks larger than 6 mm (1/4 in) as expansion joints and fill with appropriate Sika sealant. New CMU must be treated with a base coat of Sika Thorocoat®-749 Block Filler.

Mix Sika Thorocoat®-400 at a slow speed with a drill fitted with an appropriate mixing paddle to ensure colour uniformity, aggregate distribution in the coating and to minimize air entrapment. In multi-pail applications, mix the contents of each new pail into the partially used previous pail to ensure colour consistency and smooth transitions from pail to pail.

Sika Thorocoat®-400 is designed to be applied as a two-coat system, achieving a total dry-film thickness (d.f.t.) of 0.3–0.4 mm (12–16 mil). For re-coat applications, one coat is applied at 0.279–0.127 mm (11– 5 mil) d.f.t.

Apply Sika Thorocoat®-400 by brush, spray, roller, or spray-and-backroll. Maintain proper uniform wet-film thickness (w.f.t.) during application to ensure the performance characteristics desired (see yield rates section). Always work to a natural break and maintain a wet edge during application. For uniformity of colour and texture, application techniques must be consistent throughout the project. For horizontal applications, contact your local Sika Technical Sales Representative.

Roller

Use a quality 19–31 mm (¾ –1-1/4 in) nap roller cover. Completely saturate the roller and keep it loaded with the coating to build the required thickness. Never dry roll. Cross roll, maintaining a wet edge, to achieve uniform thickness. Backroll in one direction for a consistent appearance.

Spray

Equipment is available for spraying all grades of Sika Thorocoat®-400. For fine and coarse textures, it is necessary to use a heavy-duty sprayer designed for the application of coatings that contain sand particles. Contact the equipment manufacturer for further recommendations. For smooth and fine grades, backrolling in one direction after spray application is recommended to achieve uniform texture and film thickness.

Brush

Application by brush is recommended only for small inaccessible areas or for small touch-ups. Use only a nylon brush.

Clean all tools and equipment immediately with water. Cured material may be removed by mechanical means.