Foundation waterproofing membrane. 6.6 ft. x 65.6 ft. Below grade foundation waterproofing for masonry and poured concrete structures. "DELTA(TM)-MS" is a highly effective foundation waterproofing system, based on a uniquely formed air-gap membrane. Made of special high-density polyethylene (HDPE) resin. Impermeable to water and water vapour and impervious to acids and other agents. Tough, resilient and durable. Brown with orange stripe.