Let Carlisle simplify your next Sure-Weld TPO installation with Sure-Weld TPO Molded Sealant Pockets. The TPO Molded Sealant Pockets consist of an interlocking, two-piece, injection molded flexible pocket with a rigid polypropylene vertical wall and pre-formed deck flanges. This product, in conjunction with TPO Primer and White Thermoplastic One-Part Sealant, is used to waterproof pipe clusters or other odd shaped penetrations on Sure-Weld TPO Roofing Systems. TPO Molded Sealant Pockets are interlocking, two-piece, injection molded weldable pockets and are used to waterproof pipe clusters or other odd shaped penetrations.