DAP Concrete Crack Filler is a one-of-a-kind, water-activated dry powder that creates a seamless repair in one pass. Ready-to-use; no shaking or mixing required. Once applied & dampened it hardens to permanently fill & repair cracks. Resists UV fading, cracking & shrinking. The low-dust, easy-to-pour formula effectively fills horizontal cracks for a fast & easy repair. To use, prep surface, fill crack, level & mist. Use as is. DO NOT mix with other products. Interior/Exterior use.