This Lasalle Bristol Roof Installation Kit for PVC RV Roof Membrane will not chalk, streak or spot. Specifications•Compatibility: EPDM (Ethylene Propylene Diene Monomer)/ TPO (Thermoplastic Olefin) And PVC RV Roof Membrane•Includes Adhesive: Yes•Includes Tape: Yes•Includes Lap Sealant: Yes No Treatments Required - Ever Will Not Chalk, Streak Or Spot Ultimate Flexibility - Easy To Install Over The Toughest Transitions