should not exceed 4%. Repairing large cracks (>1mm) and sealing expansion joints is done by using the polyurethane sealant DUROFLEX-PU. Waterproof the surface after 12 hours of the application. Absorbent cement surfaces are stabilized with the water-based epoxy primer, WATERPROOF EPOXY PRIMER AQUA, diluted 25% with water. Non-absorbent surfaces, such as bituminous roofing felts or metal surfaces are primed with WATERPROOF EPOXY PRIMER AQUA epoxy primer, diluted up to 10% with water. Application: After 24-48 hours have passed from the primer application, mix the two ingredients at the predetermined mixing ratio using a low-rpm drill, until the mixture is completely homogenous. The application is done in one or two coats, without any dilution, with a roller or brush. Apply each coat crosswise and only when the previous one is thoroughly dry and walkable (approximately 12 hours later). USEFUL TIPS - NOTES • Stir well the two ingredients before use. • Waterproof the vertical surfaces (parapet) around the roof throughout their height. • Avoid applying the product in thicknesses over 1mm thick per coat. • Low ambient temperatures slow down the curing process, while high temperatures speed it up. • Avoid applying the product in high humidity conditions (> 75%), or if there is a chance of rain for the next 24 hours. • Do not wash the substrate with water before the application. • Once the product is cured, any application residues can be removed only by mechanical means. Two-component polyurea based waterproofing See more information about waterproofing
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