Carlisle’s Sure-Flex PVC Molded Sealant Pockets consist of an interlocking, two-piece, injection-molded flexible pocket with a rigid PVC vertical wall and pre-formed deck flanges. 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