I don't own an Airstream, but I'm coming over here in the hopes that the aluminum experts in this forum will have some great advice:
I own an Adrenalin Blast adventure trailer (here it is, in case you want to learn more about it: http://www.expeditionportal.com/foru...n-Francisco-CA
The trailer swings open, clamshell style.
The floor has been leaking, which led to wood rot. I just tore out the vinyl flooring and the plywood underneath it to find the culprit. Looks like steel screws that have rusted and were letting water in (when the trailer is closed, this floor becomes the top of the trailer).
So now I'm down to bare aluminum + the steel screws. And I'm trying to figure out how best to seal everything back up.
And since the trailer floor is an aluminum tub, I'm thinking it might be a good idea to use some kind of pour-in sealant or even epoxy to really seal everything in well.
Here are the steps I've thought up so far -- but I'm 100% open to suggestions:
1) I was going to use POR 15 marine clean + metal primer to prime the screws and the aluminum around them, and then POR 15 the screws to stop the rust (these screws are permanently installed and will never need to be removed).
2) Then I was debating using some kind of caulk to caulk the screws where they meet the aluminum, as well as caulk the aluminum joint that runs down the middle of the floor.
3) And then I wanted to literally pour in some kind of sealant or epoxy (or something else entirely?) to a depth of about 2 inches. Something that would harden when it dries. (although it *could* stay semi-soft... we'll be walking on it so it just has to be durable)
4) Then I may or may not put vinyl flooring back down, depending on what I end up using in step #3.
I was thinking about using some kind of roof sealant for step 3. But I really have no idea what would be good. I'd love something that's not *too* heavy, as the roof pivots to become the floor... but the weight will probably be OK.
Anyone have any ideas on the steps above, especially what material to use in step #3?! MUCH appreciated.
Here are some pictures:
Here is the floor from an outside view:
Here's the floor from the inside:
Here's a closeup pic of the steel screws that have been rusting (I've since cleaned up the mess around them):