Bostik 425™ Multi-Purpose Acrylic Latex Admixture is a high solids acrylic emulsion designed to improve the performance of Webcrete® 95 Bostik Hydroment® Ceramic Tile Grout™ Sanded, Bostik Hydroment® Dry Tile Grout™ Unsanded, Bostik Tile-Mate® and Bostik SingleFlex® FS Thin Set Mortars, and jobsite prepared mortar beds. Key Features: – Mortar Admixture & Grout Additive – Minimizes Cracking & Reduces Staining – Use Instead of Water to Improve Water Resistance & Durability