Viper VaporCheck II (Viper II) is the first line of defense against damaging water vapor and soil gas threats existing below the concrete slab. Viper II products are multi-layer (co-extruded), virgin polyolefin under-slab vapor barriers/retarders. The virgin resin used to manufacture Viper II contributes to its long-term stability and prevents the material from breaking down when buried below the slab.
Viper II is engineered with superior resistance against punctures, tears and water vapor. The high puncture resistance and tensile strength greatly reduces potential damage when exposed to rigorous job site conditions. Furthermore, Viper II products have very low water vapor permeance properties, key to preventing water vapor migration.
Manf Part Number
ASTM E 1745 Class A Vapor Barrier
High puncture resistance
High tensile strength
Low water vapor transmission
Protect against radon, methane and water vapor
Made from 100% virgin resin
Maintains long term performance under slab
Prop 65 Warning
This product can expose you to a chemical (or chemicals) that are known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov