Sikaflex® Crack Flex Sealant is used to seal horizontal cracks up to 1 in. (38.1 mm) wide in concrete and cementitious slabs, such as:Driveways ▪Garages ▪Sidewalks ▪Balconies ▪Pavements ▪Terraces ▪Decks ▪Walkways ▪Steps ▪CHARACTERISTICS / ADVANTAGES 1-component, no ...