Miracle Sealants GRT SLR, Grout Sealer, 6 oz. New Version

I applied 2 coats after a month of grout drying and just applied another coat and it turned my light gray grout dark gray. Now that should tell you everything you need to know. If it can't stop a liquid from absorbing and changing its color then how can it possibly stop stains. This is garbage and this company ( Rust-Oleum ) is LYING to you... BTW, I do tile for a living... Buy something else besides this bottle of water....