Viper II is a unique high-strength polyolefinbased under-slab vapor barrier designed to prevent moisture migration through concrete slabson-grade. It reduces water vapor emission transfer and moisture migration from entering the building envelope on commercial, industrial and residential applications.

Designed to keep condensation, mold, and mildew at bay—without turning your project into a damp comedy—Viper II protects flooring, finishes, and moisture-sensitive furnishings inside the building.

Key Features & Design

• Class A performance — Exceeds ASTM E 1745 “Class A” guidelines.
• Manufacturing — Manufactured using multi-layer extrusion technology from virgin polyolefin resin.
• Material composition — Made of high-strength polyethylene with a layer of metallized film.
• High strength — High puncture and tensile strength for durable protection.
• Long-term reliability — Maintains long-term performance after exposure to adverse soil conditions.
• Moisture control — Greatly reduces water vapor emission transfer and moisture migration into the building envelope.
• Gas migration mitigation — May be used to reduce radon and methane gas migration and is resistant to other adverse soil conditions.
• Installation — Easy installation, designed for single-person setup.
• Cold climate suitability — Suitable for use in cold climates, helping prevent moisture penetration.

Viper II is a practical, no-nonsense choice for protecting floors, finishes, and interior air quality in commercial, industrial, and residential projects. It’s part of a comprehensive line of Viper vapor barriers designed to tackle moisture at the source.