Mapei Mapeproof HW per 3' 7" x 16' 5" Roll

Mapei Mapeproof HW

Mapeproof HW waterproofing membrane is composed of sodium bentonite encapsulated between two polypropylene geotextile fabrics – a nonwoven and a woven fabric – at a rate of 1.13 lbs. per sq. ft. (5,5 kg per m2). The nonwoven fabric is needle punched through to the woven fabric, with thousands of fibers mechanically locking the sodium bentonite clay in place. After backfill is placed and confined under pressure. Mapeproof HW hydrates and forms a monolithic waterproofing membrane when exposed to moisture. Mapeproof HW contains zero VOCs and can be installed in most weather conditions as well as to green concrete.

The swelling characteristics of the sodium bentonite clay in Mapeproof HW can seal small concrete cracks caused by ground settlement, concrete shrinkage or seismic action. Mapeproof HW also forms a strong mechanical bond to concrete when the concrete is poured onto the nonwoven geotextile fibers.

Features and Benefits

• Ideal waterproofing for new and rehabilitation projects
• Can be installed over damp or green concrete substrates
• Self-healing if punctured
• Mapeproof HW is not affected if the level of the water table rises and falls.
• The needle-punch pattern in the geotextile fabrics guarantees that the sodium bentonite is held firm and stable, even when Mapeproof HW is applied vertically.

Where to Use

• Below-grade vertical and horizontal foundation structures
• Cast-in-place concrete applications including backfilled concrete walls
• Underground tunnels with earth-covered roofs
• Below concrete slabs and elevator pits
• Blindside applications including soldier piles, lagging, steel sheet piling, secant piles, shotcrete and stabilized soil-retention walls