Had water intrusion on my Mountain Aire, tried several things to stop it, never could. My Essex had a very little intrusion on the drivers side frame rail, and at the bottom of the wet bay and the pegboard bay at the bottom corner's.
So I pulled the drive's off, sat and looked at it, and went under and steamed cleaned the entire rear area, even got up in between the frame rail's laying under it! Not a fun start to a project!
The picture's will show what I did, Product's used:
1. The Eastwood Company rubberized flexible undercoating
Best rubberized product I have ever used, expensive but worth every penny!
2. 1" foamboard
3. Loctite closed cell spray foam
4. Dow Corning 732 Rubberized Silicone(Superior Product, it is super durable, tough, and using it is like welding with it)
5. Abs Plastic Sheet 1/8" x 48" x 96Ē Textured 1 Side Vacuum Forming
6. Small Parts 0812KPMB Steel Self-Drilling Screw, Black Phosphate Finish, Modified Truss Head, Phillips Drive, #2 Drill Point, #8-18 Thread Size, 3/4" L
After a week of fan's, drying everything, got up in between the frame rail's and used the Dow 732 to go inside all the wiring cover protector's and sealed the inside good in one spot so water has to stop there and not travel through the wall.
Then the spraying of the rubberized coating started, first everything up in between the frame rail's( It will spray through one of those red spray extensions really good) Stuck the red extension inside the wiring cover's also and sprayed.
And everything that you see in the photo's had several layer's of this coating sprayed on it. 15 can's for the entire project plus 1 qt. of brushable coating.
Then custom cut the ABS plastic to fit, screwed it and sealed it, leaving the bottom unsealed and not screwed so if any water gets in behind it, it can get out the bottom. Once sealed with DOW 732, it was sprayed with several coats of the rubberized coating. Installed a 18" flap between the rear of the drive's and the tag.
And the picture's don't show the rear FWS tube and gearing plastic cover was reinstalled and sealed.
I am going to be very shocked if I get any water into the compartment's in front of the drive's anymore.....
Thanks for looking!