Tech Area > A/C, Heating and Cooling

Heater box sealing

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Norm340:
I'm looking for what would be best to use to seal the outside top of the heater/AC box at the firewall.
OEM looked like a thick tar that has harden over the years.
Kinda thought of maybe using a black seam sealer and or Windshield sealant or something similar?
Any ideas would be appreciated.


Thanks   

daveismissing:
Sounds alot like butyl tape that glazers use. I have forgotten what the specific automotive version is called.

daveismissing:
"3M strip caulk " might work?

Norm340:

--- Quote from: daveismissing on June 16 2019, 04:44:07 PM ---"3M strip caulk " might work?

--- End quote ---


I was going to use that strip caulk for the lower part of the box.


But when looking for the Butyl tape you mentioned earlier I did find this.
MONO Silicone PRO Premium Silicone Rubber Sealant
https://www.homedepot.ca/product/mono-silicone-pro-premium-silicone-rubber-window-door-sealant-black-290-ml/1001001863

earlbrown:
That'll work as long as you never want to get that heater box off again.



and those guns are bad about drips and stuff after you release the trigger.

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