Sikaflex Crack Flex Sealant is a one part, polyurethane sealant for permanently repairing cracks in horizontal concrete surfaces. It can be used in cracks up to 1 in. wide and provides long term durability. Its elastic technology formulation allows the sealant to remain flexible and move with the crack.. Gradually self levels and remains permanently elastic. Textured polyurethane sealant to blend with concrete. Able to fill horizontal cracks in concrete up to 1 in. wide. Color Family: Gray. Color/Finish: Gray. Drying Time (hours): 2. Features: Crack Resistant,Paintable,Pre-Mixed,Self-Leveling,Stainable. Product Weight (lb.): 1 lb. Recommended Application: Cement,Concrete,Masonry,Mortar. Repair Type: Crack Filler,Sealant. Use Location: Floor. Container Size: 10.1 oz.