Oatey 11937 No Caulk Plastic Base Roof Flashing, 11 in. x 15 in, Fits 1.5 in. to 3 in. Pipes, 1.5-Inch-3-Inch, Black Product Description Seal roof penetrations against water damage with Oatey No-Calk Plastic Drip Edge Flashing. The flashing contains a base that is made of rigid thermoplastic with an elastomeric collar that seals watertight against the vent pipe. Do not use petroleum-based sealing compounds on thermoplastic base or collar material of roof flashing. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry Features Slides over pipe. Type of base determines pitch Non-fading, non-cracking and non-rusting bases and sealing collars Ring on collar tears off, allowing flashings to seal different pipe diameters Approved for Type B installations Not for hot-mopped or built-up roofs USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.