Forum Discussion
mosseater
Apr 14, 2015Explorer II
When I installed mine, I used Butyl tape under the fan flange and Dicor at the edge. Since I was putting vent covers over the fan it wasn't going to see the sunlight ever again so the Dicor will probably outlast me. If you really want overkill, do the Butyl tape, a thin bead of Dicor and cover the whole edge with wide Eternabond. Whoever buys the trailer next will either thank you or curse you. I put a piece of Eternabond over a small cut in the roof several years ago and it's still hanging in there.
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