I've had my trailer for a year now and its time to re-caulk the roof. Trailer is a Flagstaff, Signature Ultra light with gel-coat sides and a fiberglass front cap. It lives in my uncovered driveway and still looks like new. I've kept it clean and regularly treated with Aerospace 303. Stickers didn't fade and the gel coat still looks great.
In any event, I've never re-caulked anything like this and need some advice on how to properly prep and apply.
My caulk looks fine with the usual slight cracks in the surface and and what looks like a black or dark grey film over the top of it. Can't be mold as I live in SoCal where it is bone dry with very little humidity.
My question is, how do I prep and apply the new caulk? Do I just put it over the top of the existing? Do I need to prep the existing, remove it, etc..? If so, how?
Any advice would be appreciated.
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Wash the entire roof suing Dicor cleaner designed for the job, or one of the other NON petroleum cleaners from your local RV dealer. Inspect and apply Lap Seal directly over the old caulk as long it is in good condition. If it is really bad a plastic scraper will help remove any bad areas. Be careful not to scrap or damage the roof material itself.
Cleaning is the important part. I use acetone, it will remove all the crud and allow for a good bond for the new caulk. I would recommend Dicor self leveling and fill in any cracks. If there are any areas that the old caulk seems to have lost its bond remove it completely, clean and replace.
Harold and Linda
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John, if you want to eliminate that part of your maintenance program, clean up the caulking with acetone or Eternabond Cleaner, and put Eternabond tape over all your caulked areas. Apply a lot of hard pressure as you're installing it, as that activates the adhesive. Tape it, and forget it!
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