Color Fast Tile & Grout Caulk is easy to use, it comes color matched and texture matched for that perfect look around tubs, showers, counter top backsplashes, doors and windows and many other uses. Easy cold water cleanup with just a damp sponge. Color Fasts formula is non-slump, so its simple to use on vertical installations. When fully cured, Color Fast Tile & Grout Caulk offers superior water and UV resistance and meets ASTM C-834.