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alleycat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote alleycat Quote  Post ReplyReply Direct Link To This Post Topic: rust
    Posted: 28 Oct 2015 at 1:01pm
have any of you guys used expanding foam to fill rust holes? marine foam is supposed to be water proof.
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EzCruiser View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote EzCruiser Quote  Post ReplyReply Direct Link To This Post Posted: 29 Oct 2015 at 9:10am
IMO I would only use something like that as a quick fix on something that you aren't planning to ever fix the "right" way. Even if you're using it as a filler I would be careful. I have a friend that used it in his aluminum boat, under the seams and it expanded with enough force to bust the rivets and crack open the aluminum bottom! Oops! It's pretty much impossible to clean up(cured foam) without harsh chemicals and you shouldn't attempt to weld anywhere near it as it becomes combustible around 230-240 degrees. Finally, since it's a "waterproofing" spray, it has the potential to sweat, puddle moisture or water and create more problems later. I have seen it used in the firewall of a 620. Owner didn't cut down the foam or make any effort to make it look better. Then he spray painted it black, so it really looked like someone took a bag of -on fire- marshmallows and stuffed them in the rust of the firewall from the engine bay and said "job done".
Show and tell about what you're trying to fix!!
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alleycat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote alleycat Quote  Post ReplyReply Direct Link To This Post Posted: 29 Oct 2015 at 10:49am
thanks ez!
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smooth620 View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote smooth620 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Oct 2015 at 3:47pm
Gasoline will dissolve Styrofoam but unsure of marine foam. Gasoline and Styrofoam are key ingredients to make Napalm so be extra careful. Don't ask me how I know.....lol!
Better to learn from other peoples mistakes than to make them yourself.-Anonymous

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