Locate the damaged area on the roof. Roof leaks are not always directly above the dripping portion of a ceiling; check the entire roof and look in the attic for wet spots.
Clean the damaged area and surrounding rubber membrane by rubbing it with a rag soaked in acetone.
Dry the damaged area with rags while a helper holds an umbrella over you and the roof.
Cut a piece of Eternabond roof repair tape to size. Remove the backing and apply the tape over the damaged area. Press it into place, then roll over the tape with a weighted roller to firmly seal it to the rubber roof.
Paint two coats of a UV protective sealant over the tape when the weather clears and the roof is completely dry.