Forum Discussion
westend
May 28, 2015Explorer
I've done this same job, removing years of different material patchwork off a metal roof. First, put that can of Heng's roof seal on a shelf. You won't be needing that for awhile and it really doesn't act as a joint seal.
The thicker material can be removed with heat gun and scraper, followed by a wire wheel with 4" grinder. After the bulk is removed, wash first with mineral spirits and a plastic scrub pad, followed by lacquer thinner or acetone and a rag. The surfaces should now be clean enough to accept a sealing system.
Initially, I tried sealants in a tube but eventually taped all the joints and through holes in the roof with Eternabond tapes. My roof is now leak-free and has been like that through two Minnesota Winters.
About every other year and sometimes yearly, I check the integrity of my trailer from leaks by performing a pressurized leak test. Search the Forum to see how that is done. It is the most reliable means to see if you have even a pinhole leak.
BTW, there is no place on an RV exterior where silicone should be used. It is the Devil. We use urethane or polymer based caulks like Dicor or Geocel Proflex RV.
The thicker material can be removed with heat gun and scraper, followed by a wire wheel with 4" grinder. After the bulk is removed, wash first with mineral spirits and a plastic scrub pad, followed by lacquer thinner or acetone and a rag. The surfaces should now be clean enough to accept a sealing system.
Initially, I tried sealants in a tube but eventually taped all the joints and through holes in the roof with Eternabond tapes. My roof is now leak-free and has been like that through two Minnesota Winters.
About every other year and sometimes yearly, I check the integrity of my trailer from leaks by performing a pressurized leak test. Search the Forum to see how that is done. It is the most reliable means to see if you have even a pinhole leak.
BTW, there is no place on an RV exterior where silicone should be used. It is the Devil. We use urethane or polymer based caulks like Dicor or Geocel Proflex RV.
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