Thoroughly stir the splice adhesive before and during use. Prepare the Splice Adhesive and Apply it with a Brush: Note: If you are using a self-adhering peel-and-stick EPDM patch or tape to repair an EPDM rubber roof, you should not apply adhesive to the patch itself. You must thoroughly clean the membrane before applying the patch. A second cleaning with weathered membrane cleaner is often necessary.Īpply EPDM splice primer to the clean area and allow it to dry. Then clean the area again using weathered membrane cleaner. Repeat this process until all of the dirt is gone, and then dry the area with a clean cotton rag. Proper membrane preparation is accomplished by first scrubbing the membrane with a soft-bristled scrub brush (do NOT use a brush with wire bristles) and warm soapy water, then rinsing with clear water. It is very common to see failed EPDM repairs, even when they were done by professional roofers, due to the old membrane not being cleaned or not being cleaned thoroughly enough.įine particles of carbon black continually migrate out of EPDM membranes as they age, so even a membrane that looks fairly clean will often have a layer of black soot-like material on its surface. When you repair an EPDM rubber roof membrane which has been in service for some time, it is absolutely vital that you remove the accumulated field dirt. A puncture in an EPDM rubber roof membrane caused by a dropped piece of plywood. Note that even a pinhole will require a 6″ x 6″ patch. Round all corners of the repair piece with scissors or shears. The repair must extend a minimum of 3 inches beyond the edge of the hole in all directions.Ĭut an appropriate-sized piece of EPDM membrane or EPDM tape. This is how to repair an EPDM rubber roof membrane puncture using a patch made of EPDM rubber or EPDM cover tape.
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