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Old 11-18-2013, 08:55 AM   #44 (permalink)
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Sorry to revive this thread but its the one that links from the 65+mods.

So I did a little bit of reading around about this and found some info. I did this because, like user khafra, I am concerned about engine fires and increasing engine temperatures.

It seems the best kind of foam to use is "Closed Cell Epichlorohydrin (ECH) Sponge Rubber" as it used for "under-the-hood applications:" Closed Cell Sponge Rubber, Expanded Rubber Stockwell Elastomerics , and resists up to 300 degrees Fahrenheit.

This however, isn't readily available in Home Depot or Auto Zone, so the next one up is PVC foam; the best against fires, (Weatherstripping & Weatherseal by | Open Cell and Closed Cell, Single Sided Weatherstrip Ether tape, Ester tape, Felt tape products for your weatherstripping needs) but unfortunately it apparently produces fumes at higher temperarures: Closed-cell PVC foamboard - Wikipedia, the free encyclopedia (then again they all might.)

Finally we have foam made of "Closed Cell Neoprene." How to Choose the Right Weatherseal: A Guide to Selecting and Applying Weatherstripping Tape as it has high heat tolerance; about 150 degrees sustained/200 intermittently and is also fire-retardant. While I can't find any in stores by the "neoprene" name without having to buy over 100 feet of it, some websites use it interchangeably with the term "sponge rubber," something they sell at home depot. (Some sites call sponge rubber things that don't have neoprene anywhere in the description.)

It would be good to find out those specific temperatures, as well as the average-hot-day temperature under the hood, and whether or not these will affect the small quantity of PVC we need by much.

If anyone has this info please post it up, so we can make better choices.

Last edited by MileMonger; 11-18-2013 at 06:53 PM..
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