ProFlex flexible RV sealant

Question

It seems like most people (including my dealer) suggest using this product for all general non-roof sealing jobs (along diamond plate edge, outlets, trim pieces, etc..I know ProFlex says it can be applied over itself.  Not knowing what type caulk was originally used on my fiberglass trailer, should I remove all of the old first, or will this produce adhere ok over most types as long as you clean it good first?

garygus · Answer

My experiences with Pro-Flex have been that it is hard to work with and attracts dirt like a giant sponge after it is applied.  I would suggest that you call your manufacturer and find out what they use and do the same. And, I did clean off the old when I used Pro-Flex.

snowman9000 · Answer

If you don't have silicone on there now, you can most likely go over it with ProFlex.  What I do is use a rag dampened with lacquer thinner to clear the scum off the old caulk first.  OTOH, any of the old caulk that comes off easily, you might as well remove.

jdog · Answer

Why can you not use it for roof sealing?

go_dawgs1 · Answer

I use Proflex on all seams of my last 3 rv's. I would scrap the old caulking off first and put new on. I use the liquid for roof seams and the caulking in a tube for side seams. I have not found it to attack any more dirt then any other caulking. On the roof seams I usually apply a coat over the other each spring. I clean the surface first and then apply a coat. I have the luxury of having the MH in a garage so I can work in any weather, but the liquid works best when applied at above 60 degrees.

homeless_by_cho · Answer

dalmationlovers wrote:I use Proflex on all seams of my last 3 rv's. I would scrap the old caulking off first and put new on. I use the liquid for roof seams and the caulking in a tube for side seams. I have not found it to attack any more dirt then any other caulking. On the roof seams I usually apply a coat over the other each spring. I clean the surface first and then apply a coat. I have the luxury of having the MH in a garage so I can work in any weather, but the liquid works best when applied at above 60 degrees.dalmationlovers:Are/were all these roof surfaces fiberglass that you used the Proflex on?LeRoy

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