Viper CS Crawl Space Vapor Barrier
A Better Way To Encapsulate™  
Product Information
Triple-ply, cross-woven reinforced, extrusion coated, virgin polyethylene membrane.
Thickness, Class, Color, Roll Size
10-mil, Class A, White, 12' x 200'
(2400 sf coverage)
the best crawl space vapor barrier
Viper CS Flyer
Viper CS Installation

Technical Data pdf
Viper CS 10-mil Specification

pdf Accessory Data Sheets
4" x 180' White Poly Seam Tape
VaporCheck Mastic
Traditional dirt crawl spaces are full of moisture that enters via evaporation and diffusion through the floor and sidewalls. An important part of a crawl space moisture control strategy is the installation of a vapor barrier. A vapor barrier provides the crawl space with a moisture and soil gas protection layer that decreases the amount of moisture and radon present in the crawl space. This greatly reduces the risk for:
Mold   Decreased Insulation R-Values   Dust Mites
Mildew   Increased Heating & Cooling Bills   Aggravated Allergies
Wood Rot   Odors   Poor Storage Environment
Floor Failure   Insects   Poor Indoor Air Quality (IAQ)
Viper CS is a "Class A" vapor barrier with excellent physical characteristics, including high puncture resistance, high tensile strength and low water vapor permeance. It will prevent ground moisture from entering the crawl space when installed on the walls and floor, greatly reducing the negative effects of a moisture laden crawl space.
When using Viper CS in a crawl space application, you will be providing the home or building with the best protection on the market! Viper CS offers several advantages over other crawl space vapor barriers:
Superior Puncture & Tear Resistance
  • Reduces chances of product damage during installation
  • Maintains integrity over time under foot traffic and storage
Super Low Water Vapor Permeability
  • Qualifies as a true vapor barrier (perm rating less than .01)
  • Ensures an effective seal against pressure driven moisture
Extrusion Coated Bright White Finish
  • Provides a bright, clean look for the crawl space
  • Smooth coating allows for easy removal of dirt, footprints and smudges
crawl space vapor barrier