Firewall lip sealer

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Zorm
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Firewall lip sealer

Post by Zorm »

Cleaning up my firewall for painting. Pressure washed and de-greased it and the sealer or whatever they used on the lip, I guess the spot weld area from the firewall to the floor board, fell apart or just came out. I removed the rest and am assuming the sealer was there to keep from collecting water?

https://imagizer.imageshack.com/img921/5080/KLMMZM.jpg

https://imagizer.imageshack.com/img921/9559/LhehsH.jpg

https://imagizer.imageshack.com/img924/8902/Hkz71m.jpg

So, what can I use for a replacement?
1971 F250 Camper Special, family owned since 1972
1983 Cherokee, last of the big ones, bought in Italy, family owned since 1998
1965 Corvair Corsa Convertible, 140 engine, 4 speed.

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jzjames
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Re: Firewall lip sealer

Post by jzjames »

Image Image
I would use either one of these to keep out moisture from collecting in that trough.
Clean it out first with a wire brush, tape it off and lay in the product. No need to buy expensive seam sealer for that area.
I actually think the asphalt-based roofing tar would be the preferable, it will seal the area completely from moisture.
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MAK
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Re: Firewall lip sealer

Post by MAK »

Lots of options from cheap to good to best, depending on what kind of job you are doing and how much you want to spend. Your local auto parts store should have some standard old school seam sealer in caulk tubes. The newer two-part epoxy sealers are supposed to be the best, but price reflects that and you need a special dual caulk gun for them.
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sargentrs
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Re: Firewall lip sealer

Post by sargentrs »

I used 3M self leveling seam sealer on mine.
https://www.summitracing.com/parts/tes-08307/
Worked very nicely filling up the horizontal seam across the firewall. Level your cab before application and just lay it in. It truly is self leveling and fills with a smooth look.
You'll also need the mixing nozzles
https://www.summitracing.com/parts/tes-08193/
I improvised with a standard caulking gun and some pieces of flat bar. PITA doing it that way but it worked.
If I do it again I'll buy the gun. https://www.amazon.com/dp/B07Q8FVTXZ/re ... 1DbMH55FH6
Randy
1970 F100 Sport Custom Limited LWB, 302cid, 3 on the tree. NO A/C, NO P/S, NO P/B. Currently in 1000 pcs while rebuilding. Project thread: http://www.fordification.com/forum/view ... 22&t=59995 Plan: 351w, C4, LSD, pwr front disc, p/s, a/c, bucket seats, new interior and paint.
1987 F-150 XLT Lariat, 5.0/C6 auto.
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