Durock™ CST™ Moisture Vapor Reducer
Penetrating concrete moisture barrier utilizing reactive chemistry
USG Durock™ CST™ Moisture Vapor Reducer is a single component moisture mitigation system that reacts with concrete to create a permanent moisture barrier 2-4 mm below the surface.
USG Durock™ CST™ Moisture Vapor Reducer contains moisture-responsive particles that swell and contract to help regulate moisture vapor transmission rates at the surface of concrete.
Effective at managing MVER up to 10 lbs. (ASTM F1869) and RH up to 99% (ASTM F2170)
Silicate-free penetrating concrete moisture barrier
Moisture-responsive particles help create a permanent membrane 2-4 mm below the surface
Maintains a consistent pH at the surface level
Maintains surface profile for optimal bond of patching and leveling compounds and coatings
Dries in as little as 1 hour
Can be applied 24 hours after concrete is poured