What does sealing an Argosy before paint look like

[woodlandfarm]

We will be working on the body over the winter, getting ready for spring paint. From what we can tell, we have the usual leaks around the light fixtures (exterior running) and around one of the roof vents.

We do not intend to remove any interior siding if not necessary. We will be gutting, removing all cabinets and bathroom fixtures for a thorough cleanup / fix.

From what I can tell, we should drill out the rivets on the roof vent and seal and re-rivet. makes sense. Same with the lights

But what about the seams themselves. Do you just, as a precaution, put some sealer on prior to paint? Or if it is not leaking don't mess with it?

I have seen the comments on sealers, I think we are OK with our understanding, but if someone wants to repost their thoughts, I will take it in this link.

Carl

[DKB_SATX]

Is there something wrong with the roof vent, or are you replacing it with a newer type like a FantasticFan? Unless it was improperly installed, you may be able to reseal it in place. If you're going to the effort of drilling out the rivets, having 2 trailers with the original vents and fans I would take that opportunity to install a modern one. (In fact that's what I'm doing with the vents in the 28' rear-bedroom trailer... I'm going with the MaxxFan Deluxe so they can stay open in the rain.)

[woodlandfarm]

So maybe if I rephrase the question... Do you put sealant on seems before you paint, even if they are not leaking. Do you just cover the rivet heads, or do you take the rivits out and re-seal and replace?

[reinergirl]

Sealant by its very nature would expand and contract, paint does not. I would remove all sealant currently on the trailer during the paint prep, paint and then re- seal. That way when the sealant fails in the future you can remove it and seal again.

[DryFly]

Originally Posted by woodlandfarm

So maybe if I rephrase the question... Do you put sealant on seems before you paint, even if they are not leaking. Do you just cover the rivet heads, or do you take the rivits out and re-seal and replace?

It probably depends on the paint you use. I've caulked all seams with Trempro 635 in preparation for painting. If you use a urethane paint like Boat Doc used on his Argosy, then, according to Boat Doc, definitely caulk before painting. Automotive paint may be different.

When I get to the point where I paint my Argosy, I'll be going the urethane route. I think urethane is the way to go, at least from my research so far.