Viper II Double Bond Butyl Tape - 2" x 90'

Viper II Double Bond Butyl Tape - 2" x 90'

Viper II Double Bond Butyl Tape is a high-performance, double-sided 23-mil butyl adhesive tape designed for demanding vapor barrier sealing applications. Its aggressive adhesive on both sides creates a strong, watertight bond between overlapping seams or between vapor barriers and foundation walls, piers, or other structural surfaces.

This tape is ideal for use in crawl spaces, basements, and slab-on-grade construction where airtight and moisture-resistant seals are critical. Viper Double Bond Tape excels on rough or porous materials like unprimed concrete, OSB, and plywood, making it especially effective on jobsites where perfect surface prep isn't always possible. It also self-seals around nails and fasteners, maintaining barrier integrity after penetration and thermal cycling.

Contractors rely on this butyl tape in extreme conditions—it installs in temperatures as low as 0°F and remains thermally stable up to 300°F. It’s also UV resistant for up to 6 months and compatible with most building sealants. The tape is ICC AC148 compliant and eligible for LEED credits, making it a reliable choice for both performance and sustainability.

Features

• Double-sided butyl adhesive for strong bonding on both surfaces.
• Seals vapor barrier seams, foundations, and piers.
• Adheres well to rough or porous materials like concrete and OSB.
• Self-seals around nails and fasteners after puncture.
• Installs in temperatures down to 0°F and stable up to 300°F.
• UV resistant for up to 6 months of exposure.
• Replaces messy caulks as a clean, gasket-style solution.
• Compatible with most common building sealants.
• Long-lasting adhesive won’t dry out or harden for at least 10 years.
• ICC AC148 compliant and LEED credit eligible.