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. Fixes cracks in concrete sidewalks & driveways, patio pavers, landscaping stones, ceramic tiles, cement blocks or bricks. 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. Country of Origin: United States. The color name grey can also be spelled as gray.