Call us at 855.877.3630


20 Mil HDPE/Bentonite Sheet Membrane Dual Waterproofing System

4' x 24' Roll

Be the first to review this product

Availability: In stock



Product Data Sheet


Paraseal GM/LG – 20 mil is a sheet waterproofing and methane-mitigating membrane consisting of 20 mils of HDPE, expandable, granular bentonite and a protective layer of spun-bonded polyester. The composite weight of the material is up to 1.0 lb/ft², creating a dual waterproofing system. The HDPE extends beyond the bentonite on the perimeter edges to create a clean surface for Para JT Tape and Parastick 'n' Dry Tape installation.


Basic Uses

Paraseal GM/LG – 20 mil is designed for use in post-installation submerged conditions, on blindside walls, and under slab where hydrostatic water head and/or methane conditions exist. It may also be used on backfilled walls.

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.

Write Your Own Review

You're reviewing: TREMCO PARASEAL LG

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars