I did mine. It's on my 1992 Gulf Stream TourMaster! It was changing color and looked like the skin was getting really thin! I needed to get the roof into better condition to ensure I had no water infiltration and get it to stop running chalk lines down the side of the coach in preparation for body work and new paint. Rather than paying the 1200$ for a new membrane I cleaned the roof with an industrial degreaser (something like spray nine) and then treated it with Techniseal! Although this material is not recommended for this application by the manufacturer I knew someone else who had used it 5 years ago and it's standing up very well. I have been walking on the roof since I applied it and it has adhered great. This took about 8 hrs of work over 3 days to complete this job and no more chalky lines down the side of the coach when it rains.
In passing I went by what it looked like too. Better safe than having water inside!
I did mine!
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