All of our information is sourced from manufacturer data.
ISI Building Products
Viper II 10-Mil Class A
Vapor Retarder (Class I)
Ceiling, Sloped Roof, Wall
Standard Sizes: 14' 0"
Standard Sizes: 17' 6"
Standard Sizes: 0"
Manufacturer Design Notes
Extend Viper 10-mil over footings and seal to foundation wall, grade beam or slab at an elevation consistent with the top of the slab or terminate at impediments, such as water stops or dowels. Use Viper Double Bond Tape or a combination of Viper Double Bond Tape and Viper Vapor Tape at such terminations.
Rate of airflow through the barrier per square foot at a specified pressure difference
Product Weight Per Area
Roll Tensile Strength
Weight needed to break the roll, per inch of width
Water Vapor Transmission
An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury
Minimum Temperature Rating
The lowest temperature that the product has been confirmed to still function at.
Film Tensile Strength
Pressure required to break the film
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