Aluminum Retrofit Roof Drain with Sealant Tape allows for quick replacement of existing roof drains. Drain body is constructed from 0.125" aluminum for durability. Sealant Tape protects against water backup by expanding up to 4 times its original thickness. Available with two types of strainers (plastic and aluminum) and a variety of flange options (plain aluminum, TPO clad, PVC clad and asphalt coated) to accommodate most roofing systems.