Viper II Class C is a high-strength polyolefinbased under-slab vapor retarder designed to stop moisture migration through concrete slabs-on-grade. It protects commercial, industrial, and residential projects by reducing moisture transfer, condensation, and the risk of mold—and yes, it also helps keep radon and methane migration in check.

Key Features & Design

• Manufactured using multi-layer extrusion technology from virgin polyolefin resin
• Maintains long-term performance after exposure to adverse soil conditions
• Exceeds ASTM E 1745 “Class C” guidelines
• High puncture and tensile strength
• Greatly reduces moisture migration through slab-on-grade applications
• May be used to reduce radon and methane gas migration and is resistant to other adverse soil conditions
• Size: 14 ft x 210 ft - Full Range

Engineered for long-term performance, Viper II Class C helps safeguard interior spaces from moisture-related damage to flooring and moisture-sensitive furnishings. Its robust construction and Class C compliance make it a reliable choice for a wide range of building envelopes.