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I have a standalone garage built into the side of the hill. On top is a rubber roof that appears to be in decent shape. However, there is a gutter around the edges that is not sealed to the roof. Obviously I need to clean off the roof and under the flashing/gutter edge. Do I need to take it all off and redo it? Or can I just clean under and seal it with something? What do I use? Roofing tar? alt text

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You can seal that gap quite effectively with a product called Eternabond - it's very popular in the RV world to seal roof seams, vents, windows, etc. Simple to work with (it's basically like a roll of tape), waterproof and very durable.

Eternabond Website

Good source for Eternabond

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I think this would have worked if I didn't have other issues at stake. – Peter Aug 31 '10 at 13:58
Bummer - Eternabond is very good at sealing holes but it's not the panacea of roofing repair – kkeilman Aug 31 '10 at 15:59
up vote 0 down vote accepted

After realizing I had screw holes in my rubber and some other problems, I had to do a total roof replacement. So, sealing this gap wasn't my solution.

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