Both sealers and grout releases protect the tile surface from staining that is caused by grouting. The difference is, a grout release, such as UltraCare Grout Release, is designed to be washed away during the grouting process, leaving no protection behind, while a sealer, such as UltraCare Penetrating Plus Stone, Tile & Grout Sealer or UltraCare Penetrating Plus SB Stone & Porcelain Tile Sealer, stays behind, providing continued protection after grouting. For more details, click here.