Pure-Color RTU, an innovation the ready to use grout space, Pure-Color RTU can be used interior, exterior, and in wet or dry environments. It is easy to clean during installation thanks to the grout pigment being integrated with the aggregate. Don’t waste time on site setting up a mixing station or dealing with grout dust, this product is ready to use with no mixing required! Pure-Color RTU Grout is a universal product for grout joints. It is easy to clean, color consistent, and requires no sealing. Pure-Color RTU Grout is resistant to cracks, stains, and many common chemicals.