Grout Complete is a one-part component premium grout additive for stain resistance. Mixes with grout in place of water, for an integrated seal, creating a harder, denser, stain resistant grout. This penetrating treatment will not change appearance or adhesion properties. When used properly, 1431 Grout Complete forms a lifetime seal, and never requires re-application. This mildew and fungus resistant seal also provides a reduction in water absorption, which reduces cracking due to freeze-thaw and efflorescence.