Versico's Lap Sealants are heavy-bodied trowel- or gun-consistency materials used in conjunction with roofing system materials. Its primary use is to seal the exposed edges of EPDM membrane splices. Lap Sealants are extremely durable. The cured rubber consistency enables it to expand and contract with the membrane. G300LS Lap Sealant is to be used to seal splice edges of cured VersiGard EPDM and uncured EPDM Flashing. White Lap Sealant seals the splice edges of cured White EPDM and uncured White EPDM Flashing.