CHENG Concrete Sealer Remover is the first step toward refinishing sealed concrete. Safe for Concrete and The Environment, this non-toxic, water-based solution quickly strips acrylic sealers from concrete without damaging the concrete"s surface. Directions: 1. Evenly apply CHENG Sealer Remover over entire concrete surface and allow 15 minutes to activate. 2. Remove the dissolved sealer with a plastic scraper or brush. 3. Wash away remaining residue using CHENG Surface Prep.