Can I use USTAINIT on the grout joints of natural stone installations?
A. Yes. Care should be taken here. Stones and granites can be porous and should be sealed before USTAINIT is applied. In addition, the polish on some stones or granites can be affected from the scrubbing in the application. USTAINIT recommends that a test area be done in an inconspicuous area prior to use to determine proper use. – Top Q.
