MAPEI Grout Maximizer 64 fl oz Grout Additive Utility Flooring A: Yes—use a moisture barrier Kitchen Carts A: Yes—use a moisture barrier such as CALI Complete underlayment or appropriate sealant Consider it an everyday essential for elevated Series Name Grout Maximizer Unit of Measure Fluid ounce(s) Unit of Measure Quantity 64 Warranty 1 year limited Base Material Water based For Use with Acrylic No UNSPSC 30111500 For Use with Unsanded Grout No CA Residents: Prop 65 Warning(s) No For Use with Urethane Grout No For Use with Sanded Grout Yes easy clean surface that repels dirt and stains Use instead of water No additional sealing required No second trips for installers Ease of use one 64 oz bottle per 25 lb bag of MAPEI Keracolor sanded grout Also available in 26 oz (Item #777137)