Bostik TruColor Pre-Mixed Grout is a patented, water-based, urethane grout offering the ultimate in color accuracy, stain protection and crack resistance for residential and commercial tile installations. This breakthrought formulation installs up to 50% faster than traditional grouts, and never needs to be sealed. Its perfect balance of flexibility unmatched performance and crack resistance. TruColor exceeds the grout-relevant portion of the ANSI 118.3 epoxy standard (modified ANSI 118.3 -UG). Perfect color every time. Color is derived from colored quartz aggregate. No powder pigment additives. No color fading, streaking, or shading, even when wet. Crack resitant flexibility. No sealing required ever. Pre-Mixed and ready to use. Chemical and stain resistant. Re-usable (when stored properly in original container). Dust-free mixing. Blockade™ antimicrobial protection . WORKING TIME: 3 hours. Easy water clean up. Non-sag formula ideal for vertical surfaces.