The TPO Molded Pipe Seals simplifies your next Sure-Weld TPO installation. They are injection-molded, pre-formed flashings that comes with universal stainless steel clamping rings. These seals are part of the Certified Fabricated Accessory (CFA) program, the only factory-fabricated TPO accessories that meet the stringent quality tolerances required to be included in a Carlisle warranted roofing system.