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.

• Sold by the 210-foot roll
• 14-foot x 210-foot, 10-mil
• 2940 square feet per roll
• Meets and exceeds the Class A, B and C requirements outlined in ASTM E 1745