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 and dampened it hardens to permanently fill and repair cracks. Resists UV fading, cracking and shrinking. The low dust, easy to pour formula effectively fills horizontal cracks for a fast and easy repair. To use, prep surface, fill crack, level and mist. Use as is. Do not mix with other products. Interior/exterior use.