Viper II White Seam Tape 4" x 180'

Viper II White Seam Tape 4" x 180'

Viper II White Seam Tape is a heavy-duty vapor barrier tape engineered for sealing seams, splices, and penetrations in plastic-type vapor barrier systems. Made from a polyethylene-coated film with an aggressive adhesive backing, this 4 in. wide tape ensures a strong, long-lasting bond that helps maintain a continuous moisture barrier in demanding jobsite conditions.

Designed for use in crawl spaces, basements, or any area where vapor barriers are installed, the tape delivers reliable performance across a wide temperature range. It features a serrated edge for easy tearing, saving time during installation without the need for cutting tools. The tape has a low water vapor permeance, making it highly effective at sealing against moisture intrusion at overlaps and repairs.

Its adhesive is low-residue, which minimizes cleanup while still delivering strong adhesion on clean, dry surfaces. This makes it a preferred solution for contractors handling vapor barrier installation, patching, and maintenance. Viper II Seam Tape is ASTM compliant and built to meet the moisture control needs of both residential and commercial projects.

Features

• Polyethylene-coated film construction for strength and flexibility.
• Aggressive adhesive bonds securely to most plastic vapor barriers.
• 4 in. width provides extended surface coverage at seams.
• Low water vapor permeance for superior moisture resistance.
• Controls harmful soil gases liek methane and radon.
• Performs well in a wide range of temperatures.
• Low-residue adhesive minimizes cleanup.
• Ideal for seaming, splicing, patching, and sealing applications.
• Suitable for crawl spaces, basements, and wall assemblies.
• ASTM compliant for vapor barrier applications.