what is this stuff, kinda like dynamat made by nasa to help cooling???

RCZ

gold is the best insulation, but its expensive. There are new, much cheaper alternatives that reflect about 95% as much as gold foil does. Unfortunately, its silver.

I wouldnt be surprised if NASA had come up with better stuff though. Probably some sort of layered mix of aluminum and fibers... I remember they came up with a crazy insulation for the space station and other missions, but that stuff is crazy expensive.

1slow370

well there is carbon-carbon ceramic think space shuttle heat sheild. i belive there was a company producing a paint additive consisting of vacuum microspheres of ceramic that is like a fine dust you mix with paint, that provides insulating effects. and it is not technically correct to say gold or silver is the best insulation as they are really crappy insulators when it comes to contact. they merely are very reflective to infra red radiation. meaning a throttle body spacer made of gold foil would work like crap, but if you cover your engine bay in it, it will keep heat trapped in your engine bay( which is a bad thing unless your turbo is right next to the frame rail and your afraid of starting your car on fire). Or at least thats the way it was explained to me. It's more of bling thing anyway, besides i hear JDM stickers work better anyway.

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Red__Zed

gold is really only good for insulating against thermal radiation. There are better things to use on an engine bay...