Custom Prism Ultimate Performance Grout sets a new standard in cement-based
grout technology. Prism's calcium Aluminate cement based
formula offers consistent color with no shading regardless of tile type,
temperature or humidity. And it will not effloresce. The rapid setting
formula results in high early strength and dense joints for the highest
stain resistance in grout joints up to 1/2".
A unique blend of lightweight
recycled glass and fine aggregate sand allows for a smooth
consistency that is easy to spread and clean.