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Tech Area => A/C, Heating and Cooling => Topic started by: Norm340 on June 16 2019, 03:39:17 PM

Title: Heater box sealing
Post by: Norm340 on June 16 2019, 03:39:17 PM
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   
Title: Re: Heater box sealing
Post by: daveismissing on June 16 2019, 04:42:29 PM
Sounds alot like butyl tape that glazers use. I have forgotten what the specific automotive version is called.
Title: Re: Heater box sealing
Post by: daveismissing on June 16 2019, 04:44:07 PM
"3M strip caulk " might work?
Title: Re: Heater box sealing
Post by: Norm340 on June 16 2019, 06:57:35 PM
"3M strip caulk " might work?


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 (https://www.homedepot.ca/product/mono-silicone-pro-premium-silicone-rubber-window-door-sealant-black-290-ml/1001001863)
Title: Re: Heater box sealing
Post by: earlbrown on June 17 2019, 08:25:38 AM
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.
Title: Re: Heater box sealing
Post by: daveismissing on June 17 2019, 10:18:16 AM
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.

I'm with Earl on both points.

PS (and you may alread know this):Good habit to develop is when u stop squeezing immediately release the plunger with your thumb and throw a paper towel under the tip- at least it give you a chance
Title: Re: Heater box sealing
Post by: Norm340 on June 18 2019, 04:01:28 PM
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.

I'm with Earl on both points.

PS (and you may alread know this):Good habit to develop is when u stop squeezing immediately release the plunger with your thumb and throw a paper towel under the tip- at least it give you a chance




I definitely would like to get that heater box off in the future.
If not for me then for the next guy who owns this car.  :icon_smile:


So what would be good to use then?


Thanks you guys
Title: Re: Heater box sealing
Post by: Steve Wood on June 18 2019, 11:56:34 PM
I used some kind of weatherstrippi ng seal that came in strips arrayed on a waxy paper...forget what it was called.  May have been by 3M? strip caulk?
Title: Re: Heater box sealing
Post by: Norm340 on June 19 2019, 11:30:17 AM
I used some kind of weatherstrippi ng seal that came in strips arrayed on a waxy paper...forget what it was called.  May have been by 3M? strip caulk?


Hey you guys thanks for all the input/help.
3M strip caulk it is then.
I'll throw the link below just to be sure I'm using the right stuff.


https://www.napaonline.com/en/p/MMM08578 (https://www.napaonline.com/en/p/MMM08578)


Thanks again.





Title: Re: Heater box sealing
Post by: Steve Wood on June 19 2019, 10:45:06 PM
Of course, I have not tried to take the top off since.....:D
Title: Re: Heater box sealing
Post by: daveismissing on June 20 2019, 09:17:54 PM
Good for stickin' the brown paper back onto the inner doors too
Title: Re: Heater box sealing
Post by: 6 PAK on January 29 2020, 10:43:06 PM
I used what they called " Dum Dum ". Wet your fingers while you remove it from the tape. I was told some dealerships use it. About $12.00 for a roll at Advance.
Title: Re: Heater box sealing
Post by: Steve Wood on January 29 2020, 11:16:49 PM
Dum dum...


I have not heard that name in years :)
Title: Re: Heater box sealing
Post by: Steve Wood on January 29 2020, 11:18:43 PM
http://www.proformproducts.com/en/products/sealers/rubberized-sealers/dum-dum-strip-caulk/
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