HDPE/Bentonite Sheet Membrane Dual Waterproofing System

Paraseal® is a sheet waterproofing membrane consisting of 15 mils of HDPE and expandable, granular bentonite. The composite weight of the material is up to 1.0 lb/ft², creating a dual waterproofing system.


  • Paraseal is designed for use on backfilled walls
  • It may be used on damp or green concrete
  • Alternative versions of Paraseal are available for lagging, split slab, under slab and methane barrier conditions