WeatherBond RBR Lap Sealant is a heavy-bodied gun consistency material used in conjunction with roofing system materials. Its primary use is to seal the exposed edges of EPDM membrane splices. Lap Sealant is extremely durable. The cured rubber consistency enables it to expand and contract with the membrane. WeatherBond RBR Lap Sealant is to be used to seal splice edges of cured EPDM, uncured EPDM Flashing, T-Joint Patches, Inside/Outside Corners, etc. Coverage Rate: 22 linear feet/tube.