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Old 10-12-2020, 07:39 PM   #1
Skoolie
 
Join Date: Oct 2016
Location: Rochester NY
Posts: 108
Year: 1986
Coachwork: Blueburd
Chassis: International S1800
Engine: 9.0L International Diesel NA
Closed cell foam

Looking for a relatively small quantity of closed cell foam to fill in some of the nooks and crannies on my bus.

Basically, I'm trying to track down the last few small leaks in my bus. My grafted in tailgate/skylight/roof raise transition is still giving me tiny leaks. The seams are welded, fiberglassed, and bondo'd at this point. I think it's leaking from the pinch in the opening of the tailgate frame... I'll have to grab pictures tomorrow... Hard to explain. But the inner and outer sheet metal fold together in the opening for the glass. A gasket presses on to the pinch seam. I think water is baking up on the sill and flowing into the pinch seam.

I have tried to fiberglass it with little luck. The gasket is a tight fit so I can't build it up to much. Another thought is to pump the gasket full of silicone and smoosh it back in place....

What I'd like to do is pump the tailgate frame/Skelton full of great stuff etc. And hopefully seal that seam.

So my question is. Who know what kind of greatstuff foam is closed cell and watertight?

Last thing I want to do is inject a sponge into a leak.

Thanks in advance.

Pics to come soon.

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Old 10-12-2020, 07:46 PM   #2
Skoolie
 
Join Date: Oct 2016
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Posts: 108
Year: 1986
Coachwork: Blueburd
Chassis: International S1800
Engine: 9.0L International Diesel NA
Instagram post link is the best I can do at the minute. Look at the last few pictures to see interior and exterior of transition area.


https://www.instagram.com/p/B_VAgCEp...=1la1tw6pnakbg
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Old 10-13-2020, 06:54 PM   #3
Skoolie
 
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Year: 1986
Coachwork: Blueburd
Chassis: International S1800
Engine: 9.0L International Diesel NA
this looks promising....

Waterproof closed cell sealant.. marine grade!

https://www.wholesalemarine.com/mari...IaAg48EALw_wcB
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Old 10-13-2020, 07:29 PM   #4
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Quote:
Originally Posted by Rochey6957 View Post
this looks promising....

Waterproof closed cell sealant.. marine grade!

https://www.wholesalemarine.com/mari...IaAg48EALw_wcB
I might try a can or two of that, I have a few void spaces I'd like to fill with something closed cell, not for insulation but to maybe keep water out. Depending on how much you need to do, this might be useful too: https://www.amazon.com/Touch-4004520...dp/B00BBFWHY0/
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Old 10-13-2020, 07:43 PM   #5
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Engine: 9.0L International Diesel NA
Quote:
Originally Posted by musigenesis View Post
I might try a can or two of that, I have a few void spaces I'd like to fill with something closed cell, not for insulation but to maybe keep water out. Depending on how much you need to do, this might be useful too: https://www.amazon.com/Touch-4004520...dp/B00BBFWHY0/
Ill look into that one. Might be more volume than I need though.
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Old 10-14-2020, 02:02 AM   #6
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Join Date: Sep 2015
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Chassis: Freightliner FS65
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Rated Cap: 71 Passenger- 30,000 lbs.
Once you break open one of those kits, how long will it last on-the-shelf after the first use?
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Old 10-14-2020, 10:56 AM   #7
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Great stuff needs to be able to expand as it cures and must be in contact with (humid) air over most of its surface to cure. If you try to fill the inside of a door with it it won't cure properly. It finally does harden but looks like Swiss cheese made of hardened plastic--not what you want.
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Old 10-14-2020, 11:14 AM   #8
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Once you break open one of those kits, how long will it last on-the-shelf after the first use?
I think you can use it up to 30 days after first use - if you have any left, and if your kit is not dysfunctional like a lot of the reviews for that link report. 15 board-feet is not a whole lot, about a cubic foot.
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Old 10-14-2020, 06:27 PM   #9
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Thank you, I was curious. Basically, no need to have all your gaps lined up to get them all at the same time. You should be able to take your time over a few days then.
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