A single piece, pre-formed thermoplastic cover that provides a simple and quick waterproofing installation detail. The thick thermoplastic construction provides the strength and durability to withstand the concrete placement. Available in four sizes: TB-3 is 3.5" (90mm); TB-6SN is 6” (150 mm) deep; TB-8 is 8” (200 mm) deep; and TB-10 is 10” (250 mm) deep.
