Viper® CS II Crawl Space Vapor Barrier
A BETTER WAY TO ENCAPSULATE™
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Co-Extruded
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Tear Resistant
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Odor Free
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Moisture Barrier
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Radon Barrier
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Lifetime Warranty
Made Smart
Viper CS II is a white, co-extruded virgin polyethylene vapor barrier designed specifically to control moisture and soil gas migration in crawl space applications.
Manufactured using a proprietary resin formulation, Viper CS II yields excellent performance characteristics at an economical price point.
Made Tough
The multi-Layer extrusion manufacturing of Viper CS II ensures high puncture, tear strength and maximum moisture protection, exceeding all permeance standards.
Engineered for long-term performance, Viper CS II comes with a lifetime material warranty, providing peace of mind for the life of the structure.
Made for Crawl Spaces
Viper CS II comes in a bright white color giving the crawl space a fresh, clean look while combating the harmful effects of radon, moisture, mold and mildew.
Installing vapor barrier under a house properly is critical for the longevity of high performance encapsulation projects. To promote best practices and professional grade installs, ISI supports a nationwide distribution network and year-round training opportunities.
Clean Air Accredited
Viper CS products are certified through Intertek's Low VOC Emissions verification. By choosing Clean Air GOLD certified products, contractors can earn LEED credits, meet WELL Building Standards, and align with the EPA's Indoor airPLUS program — all while creating a safer indoor environment for occupants.
20-MIL
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Roll Size: 12’ x 100’
Approx. Weight: 97 lbs/MSF
Rolls Per Pallet: 20
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10-MIL
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Roll Sizes: 12’ x 100’
Approx. Weight: 48 lbs/MSF
Rolls Per Pallet: 20
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15-MIL
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Roll Sizes: 12’ x 100’
Approx. Weight: 71 lbs/MSF
Rolls Per Pallet: 20
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8-MIL
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Roll Sizes: 12’ x 100’
Approx. Weight: 39 lbs/MSF
Rolls Per Pallet: 20
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Accessories
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Viper Vapor Tape
Viper Vapor Tape is a white polyethylene coated film with an aggressive adhesive designed for seaming, splicing, sealing, patching and hanging vapor barrier materials.
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Viper Double Bond
Viper Double Bond Tape is a double-sided butyl tape used for “double-locking” seams and as a gasket material between vapor barrier membrane and foundation walls.
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Viper CS Liner Pins
Viper Crawl Space Liner Pins are the best way to secure vapor barrier materials to masonry walls providing a strong mechanical attachment in concrete block, brick or stone.
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Viper CS Term Bar
Viper CS Term Bar can be installed horizontally to mechanically hold liner and provide a sealant “shelf” or installed vertically as furring strips to create R-value enhancing air space.
Training & Support
Send Us A Message
Contact us to find out how we can provide the best value and service for your next project.