USES: Stego Mastic is designed to be used as a vapor retardant membrane for use in conjunction with Stego Wrap Vapor Barrier/Retarder. Stego Mastic can be used for sealing utility and pipe penetrations in Stego Wrap.
COMPOSITION: Stego Mastic is a medium-viscosity, water-based, polymer-modified anionic bituminous/ asphalt emulsion.
SIZE: Stego Mastic comes in 2-gallon or 5-gallon pails, and 20-ounce sausage tubes.
Stego has the accessories you need to complete an ASTM E1643-compliant installation. Stego Tape, Stego Mastic, Stego Crete Claw Tape and StegoTack Tape enable efficient vapor barrier installations, saving time and resources.