Heater core insulation

[zed1]

I am refinishing the heater box and after I removed the heater core I noted that there was black foam between the core and the box.

 

I presume that the foam serves as both insulation and an anti-rattle barrier.

 

After searching the internet for aftermarket foam substitutes, I stumbled upon the Dow Great Stuff product. The yellow product is available at local home builder warehouses. The GREAT STUFF™ Pond & Stone (http://greatstuff.dow.com/products/pond-and-stone/) is the same product in black. I spoke to a Dow representative and was told that all Great Stuff products are stable up to 240 degrees Fahrenheit.

 

Has anyone found a substitute for the factory black foam?

Has anyone used Great Stuff at higher temperature?

Thanks,

Keith

[datzenmike]

I think mostly it's to prevent air from going around instead of through the core. Could be wrong but no real need to insulate. I just used foam rubber and cut to fit. As for temp, the highest it will get it 212F from the water, not even that.

[Dat Lurka]

I spoke to a Dow representative and was told that all Great Stuff products are stable up to 240 degrees Fahrenheit.

 

 

Plenty

[mklotz70]

This is what I did a couple of years ago....it's still not in use yet :(

 

http://community.ratsun.net/topic/8175-mklotz70-project-mend/page__view__findpost__p__126357

[Laecaon]

I just used regular old foam from the fabric store. Hasnt melted yet.

[bananahamuck]

I just used regular old foam from the fabric store. Hasnt melted yet.

 

 

I think that`s what my brother used on his....cheap and works.

 

 

Camper shell foam tape for me ... easy to get , cheap and works good and if not thick enough stick more on..