midyear A/C "leaker" fix sealant

[Brandon K.]

Anyone know what a good sealant to use is on the top of the A/C box on the firewall so it doesnt leak? I can see a small visible gap under the plenum (despite brand new gaskets) and it will definitely leak if not fixed. I'm sure the original stuff is no longer available. Thanks! Brandon

[Jim T.]

Re: midyear A/C "leaker" fix sealant

I can recommend 3-M Strip Chaulk. It is usually carried at well supplied auto parts stores and always at the places where body shops buy their paint and other supplies. Comes in a flat rectangular box and the chaulk is in thin strips and is paintable. Lots of uses on Corvettes.

[Doug Flaten]

Re: midyear A/C "leaker" fix sealant

Make sure you doen't use anything along the joint that will prevent you from parting the box for service. I made that mistake years ago on a Mustang heater box, and ended up cracking the fiberglass trying to open up the box.