The ChemCurb System is designed for use on granulated modified bitumen, PVC, EPDM, PIB, TPO single ply, asphalt, and coal tar B.U.R. Please note TPO Primer must be used on TPO single-ply roof substrates. When installed properly, the ChemCurb System forms a durable waterproof rubber seal around penetrations of any size. An extended manufacture warranty against leaks is activated when Chem Link receives a completed warranty card and proof of purchase.

7.5" diameter ID round consisting of (2) 3.75" radius pieces. Part of the ChemCurb System.