Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-09-2016, 08:29 PM   #1
New Member
 
Currently Looking...
Currently Looking...
walnut , California
Join Date: Oct 2016
Posts: 1
Sealant question (But not your normal caulking debate!)

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):
__________________

__________________
drodio is offline   Reply With Quote
Old 10-10-2016, 07:52 AM   #2
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,698
Have it sprayed with Rhino Liner or any other type of spray on bed liner. No need for the thickness you specified though, as it would be extremely heavy.
__________________

Aerowood is offline   Reply With Quote
Old 10-10-2016, 08:46 AM   #3
Rivet Master

 
2010 25' FB Flying Cloud
Davenport , Iowa
Join Date: Sep 2007
Posts: 1,233
Blog Entries: 1
I agree with Aerowood, Rhino is a softer type, Lin-ex is hard rubber type, or Rustolem has a do it your self type put on with roller and brush. I'm more impressed with the Rhino and it comes in colors.
__________________
Airtandem is offline   Reply With Quote
Old 10-10-2016, 09:15 AM   #4
2 Rivet Member
 
Kemblkr's Avatar
 
2003 22' International
South Bend , Indiana
Join Date: Aug 2015
Posts: 75
The rust is galvanic corrosion from dissimilar metals. Sikaflex self leveling sealant is some tough stuff and it gets pretty damn hard. You would have to get that surface completely level and lay some barrier around the edges to the depth you want the sealant.

When you start poring this stuff it quickly levels itself out. You may want to rough up the aluminum surface with some 120 grit for extra grip. The self leveling stuff is designed for concrete gaps so I would get a small piece of aluminum and do a test on adhesion and durability prior to using it on your trailer.

You should predrill the aluminum hole slightly larger than the shank of the screw and use galvanized wafer head screws.

Apply some sealant to the hole so when you install the screw there is a film between the head of the screw and the aluminum. As an alternative you could cover the hole with electrical tape and then install the screw. This would leave the tape sandwiched between the screws and the aluminum. This will eliminate the current that causes the corrosion.

Just some ideas with no real practical trials but that is what I would try personally.


Sent from my iPhone using Airstream Forums
__________________
Kemblkr is offline   Reply With Quote
Old 10-10-2016, 09:18 AM   #5
Rivet Master
 
1988 25' Excella
1987 32' Excella
Knoxville , Tennessee
Join Date: Oct 2010
Posts: 1,854
Blog Entries: 1
Is there any chance of removing the rusty screws and replacing them with stainless steel screws and a gob of sealant?
__________________
Bill M. is offline   Reply With Quote
Old 10-10-2016, 11:06 AM   #6
2 Rivet Member
 
Kemblkr's Avatar
 
2003 22' International
South Bend , Indiana
Join Date: Aug 2015
Posts: 75
Also, if you seal the aluminum and the screw heads with a coating you should not have any corrosion. Corrosion requires atmosphere so if it sealed then it should eliminate corrosion, in theory.


Sent from my iPhone using Airstream Forums
__________________
Kemblkr is offline   Reply With Quote
Old 10-10-2016, 12:56 PM   #7
59' Globester
 
twolanehwy's Avatar
 
1959 18' "Footer"
san francisco , California
Join Date: Feb 2015
Posts: 203
Get a magnet and test metal as it looks like galvi to me.
twolanehwy is offline   Reply With Quote
Old 10-10-2016, 01:27 PM   #8
2 Rivet Member
 
1973 Argosy 20
Rohnert Park , California
Join Date: Sep 2016
Posts: 40
I agree with the last 3 posts. You want to use SS screws to eliminate the bi-metalic reaction. A magnet will not pick up SS, but will be attracted to nickel plated steel or galvanized screws.
__________________
USAtraveler is offline   Reply With Quote
Old 10-10-2016, 05:04 PM   #9
2 Rivet Member
 
Barbieri's Avatar
 
2004 30' Classic
San Antonio , Texas
Join Date: Oct 2016
Posts: 79
If you say it's a tub why not put something like a hot water valve at the low point. Anything that increases the weight will also effect the castor and camber of the tires.
__________________
Barbieri is offline   Reply With Quote
Old 10-10-2016, 06:38 PM   #10
2 Rivet Member
 
2000 34' Limited
1985 25' Sovereign
LaGrange Highlands , Illinois
Join Date: Jun 2016
Posts: 52
There is a product called red guarde, sold at HD. We use it when we pour a cement shower base then tile over it. Check it out. It can B brushed on or rolled and turns to rubber.
__________________

__________________
rmatkovich is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How do you see your late model airstream 2009-2014 end caps re caulking LAWBC Leaks - Weatherstrips, Gaskets, Caulks & Sealants 1 03-17-2016 11:05 AM
Settle a debate - how frequently do you talk with your parents bonginator Off Topic Forum 18 04-04-2015 08:06 PM
The Great Frame Debate Becky B. Repairing/Replacing Floor &/or Frame 20 05-01-2007 08:44 PM
lets debate at eight! john hd Off Topic Forum 20 10-26-2004 06:45 PM
The Great Towing Debate Continues... Chuck Towing, Tow Vehicles & Hitches 9 04-30-2004 02:20 PM


Virginia Campgrounds

Reviews provided by



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:45 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.