USG Corporation’s Durock Brand CST Moisture Vapor Reducer is a single-component moisture mitigation system that reacts with the free calcium at the concrete paste layer to create a permanent moisture barrier without changing the surface profile. The reaction physically transforms the concrete surface, trapping moisture-responsive particles in the capillaries, which reduces moisture vapor emissions rates by 5+ pounds and reduces the RH by 10+%. USG Durock Brand CSTTM Moisture Vapor Reducer is ready-to-use and only requires one coat.


Back to Main product showcase button