The Molded PVC Sealant Pockets consist of an interlocking, two-piece, injection-molded flexible pocket with a rigid pre-formed deck flanges and PVC vertical wall. These Pockets can be adjusted from 11.5" (292 mm) to 7.5" (190.5 mm) in length by following the cutting lines molded into the pocket. This product, in conjunction with White One-Part Pourable Sealer, is used to waterproof pipe clusters, I-beams or other oddly shaped penetrations on Sure-Flex Roofing Systems.