A friend of mine needed a new evaporator for the Air Conditioning in his Chevy *-10 pickup. The evaporator is the small radiator/heater-core like thing in a plastic housing near the firewall that gets very cold and blows your warm car air over it to cool your car air.

The plastic housing is a clamshell two-half like thing. I don't know how it is sealed from the factory, but it looks like the shop had to crack a seal all around it to get into it.

Now it isn't very tightly sealed, and with his AC on, you can feel air blowing out the joint where the halves meet. He'd like to seal this up, but obviously it needs to be a non-permanent seal that could (in theory) be opened again if future replacement were ever needed.

Any idea what anyone here would use? Permatex? Putty of some sort? Goo?
Just wondering!

/likes to ask BC members non-BC questions because our collective wisdom is usually better than the average mechanic'*.
-Mark

They make a removable latex caulk. It'* intended for sealing windows in the winter, but can be peeled off come spring.

I've used it, and it should work fine for what you're describing.

For my folks Blazer, I used some HVAC type duct tape. Its like a really thin aluminum with a peel and stick back. Probably not the right stuff but it stopped the airflow and seems to be holding up well. First thing I grabbed when I noticed the leak, Kinda ugly if you care about cosmetics underhood though

Autoparts stores like Napa probably have the actual black gooey crap that you are supposed to use and the dealer use. Not sure what it'* called..