Source for Heater Parts

[Cliff]

I am refurbishing the blower motor plenum and heater core box (77 Cherokee 401). There is a dense foam seal between the blower plenum and heater core box that is too brittle to reuse. This part is not listed by our most common GW vendors. Does anyone know of a source for this part, or maybe an alternative material?

And another question - what is the caulk-like material that seals the boxes to the firewall?

[tgreese]

I used the pink anti-static foam that electronic parts are wrapped in. Other found material is probably ok too. If you want something fancier, there are many options from McMaster-Carr: https://www.mcmaster.com/foam/

Strip caulk is sometimes called butyl caulk. You can buy it at the hardware store as "Moretite" or online. It's used for sealing leaks around windows and such.

3M sells strip caulk for body work that you can buy in several colors. Same thing, but packaged for the body shop trade. Also available at RV supply stores.

[Cliff]

Thanks Tim. I have been a M/C customer for stainless fasteners and didn't know they also had foam and gasket material. A great resource!