All of our information is sourced from manufacturer data.
JDR Enterprises, Inc.
J Drain 400/420
Standard Sizes: 4' 0", 6' 6", 8' 0"
Standard Sizes: 4' 2"
Standard Sizes: 0-3/8"
Manufacturer Design Notes
420 & 420 XL are identical to 400 & 400 XL with the addition of a membrane protective film on the backside.
Rate of airflow through the barrier per square foot at a specified pressure difference
Water Vapor Transmission
An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury
Roll Tensile Strength
Weight needed to break the roll, per inch of width
Product Weight Per Area
lb / ft ^ 2
39, 40.5, 63, 65.5, 78, 80
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