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Oatey 4" Aluminum No-Calk Roof Flashing$10.49
Rated 180°F continuous heat and approved for Type B installations. Metal base for pitch from 0 to 40° or up to 10/12 roof. Self-sealing collar slides over pipe and requires no caulking.
Do not use petroleum based products or paint on flashing collar. Not for hot-mopped or built-up roofs.