TEC 15030463 AccuColor EFX 7 lb AccuColor EFX Epoxy Special Effect Grout Light Gray provides superior performance and unmatched design possibilities in one easy-to-use product. Dual purpose 100% solids epoxy grout and mortar is designed for tile and stone installations on floors, walls and countertops. High temperature (HT) formula is approved for surfaces subject to extreme heat or steam cleaning.