All of our information is sourced from manufacturer data.
JDR Enterprises, Inc.
J Drain 400XL/420XL
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
Weight needed to break the roll, per inch of width
Product Weight Per Area
lb / ft ^ 2
45, 46.5, 73, 75.5, 90, 93
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