As-seen-on-TV grout cleaners 01:51 We put two infomercial grout cleaners, Grout Bully and Groutinator, to the test to see if they can really make your grout look like new.

In parallel with the alkaline activation of aluminosilicates, acid activation takes place. Often less studied, the so-called phosphate-based geopolymers are little publicized due to the concerns that ...