Is it safe to use it on fire wall?? i have a huge hole in my fire wall and its allowing water to puddle on passanger floorboard..

 

I don't see why not.... what's the temp rating on it? I'd just be worried about it catching fire, but I think it's fairly high temp safe.


What's the hole from? I think you can get a rubber grommet/blockoff thingie for that, or use fiberglass resin/mat or peel-n-seal type of stuff.

 

It works, won't burn, but will turn nasty and start breaking up after a while. It also expands like MAD and will possibly end up where you don't want it. I highly do NOT recommend it unless you're using it as sound deadening in parts of the car that're hard to get to.

 

are you sure that it's not actually coolant and your heater core has gone bad?

 

im sure because it only pools when it rains heavly. No its not missing a gromet its abotu a fist sized hole

 

WIth that fiberglass mat, i hae to use the fiberglass bondo ehe? also it doesnt burn near heat riight?

 

Do it right and block it off with a metal plate.

 

...main question is, why do you have a fist sized hole?

fiberglass mat you'd use with resin, it'll cure rock hard. Not terribly structural, but it beats a gaping hole, and it's waterproof. No need for bondo, unless you wanted to smooth it out after and make it look like it never existed.
or you could do it the hard way, and weld a plate in.

 

Thats what I did when I took my heater out, just flanged the hole and welded a plate in.