DAP 32-oz Gray Concrete Patch at Lowes.com- fillers for cracks in concrete ,Easy-to-use, ready-mixed product for the repair of cracks in concrete. Repairs are ready for traffic in 30-45 minutes. It is self-leveling and dries gray to match most existing concrete. Interior/exterior use.10 Minute Concrete Mender Crack Repair - YouTube · How to repair cracks in concrete floors permanently in as little as 10 minutes. Works on all industrial type floors and even in freezing temperatures. ... 10 Minute Concrete Mender Crack Repair ...