How to get wrinkles out of rubber roofing membrane. Lay the membrane on a flat surface to rest for 30 minutes. This is often enough to allow packing creases to dissipate. For tougher creases in EPDM, gently heat the affected area using an air heat source and use a silicone roller to smooth the wrinkle out. Do not leave the heat source in one spot for any length of time to avoid damaging the rubber.
