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.

Main Features

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

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