GenFlex™ GenPrime is a cleaning and priming solution developed specifically for preparing black GenFlex™ EPDM membranes prior to the installation of Peel & Stick™ accessories. It effectively removes surface contaminants while conditioning the membrane to promote superior adhesion and long-term bond strength. Easy to apply and fast drying, GenPrime helps ensure a clean, uniform surface for secure attachment of tapes, flashings, and other self-adhered components. (Not for use on FlexWhite™ EPDM membranes.)