Viper Vapor Patch - 11.5" X 50'

SKU: 211895

| MPN: VPTP11550

IN STOCK (0)

Brand

Viper Vapor Patch - 11.5" x 50'

Viper Vapor Patch is a heavy-duty, self-adhering vapor barrier patch and pipe boot designed to seal pipe penetrations and repair plastic-type vapor barriers. It combines the durability of Viper VaporCheck 10-mil material with a high-performance all-weather acrylic adhesive, making it ideal for use in a wide range of jobsite conditions.

Contractors use Viper Vapor Patch in crawl spaces, basements, and under-slab applications to maintain vapor barrier continuity around pipes and damaged sections. The roll includes printed templates for pipe diameters from 1 in. to 8 in., spaced every 12 in. for fast and accurate cutting. Its strong tack ensures reliable adhesion in temperatures from -20°F to 180°F, even in damp or humid conditions.

This patch is easy to apply—just cut, wrap, peel the backing, and press into place. For added protection, exposed areas can be sealed with VaporCheck Mastic or Viper Vapor Tape. Built for long-lasting moisture control, Viper Vapor Patch is a reliable solution for new installations and repairs.

Features

  • Self-adhering patch for vapor barrier repair and sealing.
  • Integrates Viper VaporCheck 10-mil material for durability.
  • All-weather acrylic adhesive bonds in hot, cold, or humid conditions.
  • Pre-printed pipe diameter templates for fast cutting and fitting.
  • Fits pipe penetrations from 1 in. to 8 in. diameter.
  • Works on all plastic-type vapor barriers.
  • Retains strong tack in temperatures from -20°F to 180°F.
  • Ideal for crawl spaces, basements, and under-slab installations.
  • Easy peel-and-stick application—no tools required.
  • Use with VaporCheck Mastic or Viper Vapor Tape for complete sealing.

Viper Vapor Patch - 11.5" x 50' Specifications

Specification Details
Substrate thickness 10 mil
Adhesive thickness 3 mil
Peel adhesion 55 oz/in
Shear adhesion >24 hrs @ 22 PSI
Classification ASTM E 1745 – Exceeds Class A, B, C
Puncture resistance 15,839 grams (ASTM D 1709)
Tensile strength (new material) 136 lbf/in (MD), 134 lbf/in (TD) – ASTM 154 Sec. 9
Tensile strength (after soaking) 140 lbf/in (MD), 133 lbf/in (TD) – ASTM 154 Sec. 9
Operating temperature range -20°F to 180°F
Water vapor permeance 0.0016 perms – ASTM E 96 / 154 Sec. 7
Water vapor transmission rate 0.00058 grains/(ft²·hr) – ASTM E 96 / 154 Sec. 7
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account
Customer Questions
No Questions
Please, mind that only logged in users can submit questions