Mapeproof™ HW


Mapeproof HW waterproofing membrane is composed of sodium bentonite encapsulated between a woven and nonwoven polypropylene geotextile fabrics. The nonwoven fabric is needle-punched through to the woven fabric, mechanically locking the sodium bentonite clay in place with thousands of fibers. In the presence of water, the sodium bentonite hydrates and swells forming a monolithic waterproofing membrane. Ideal for horizontal slabs, vertical blindside, and backfilled walls applications.

Features and Benefits

  • High swelling index helps prevent water intrusion
  • Can be installed over damp or green concrete
  • Self-healing if punctured
  • Not affected by rises and falls in the water table

Related Documents