Thor Forums

[Chance]

Originally Posted by mcr1010

I used a foil faced duct insulation under the hood. It was quite sticky, but did not hold in the heat. Could have been that the underside of ducts, dash etc. may not have been as clean as it should have been even though I had washed and dried it.

A potential issue that would concern me a little is that when you stick any insulation with a sticky side to a metal surface like the underside of a hood, the adhesive side remains relatively cool because the metal hood can transfer heat to the surrounding air.

On the other hand when it's applied to areas that are partially insulated, or where fresh cool air can't keep the adhesive side as cool, then the adhesive "may" not perform as originally intended.

I'm not sure how the 100*C temperature rating for FatMat was determined. Is that the equivalent of 100*C air underhood with actual hood much cooler, or is it like applying the insulation inside an oven at 100*C where all parts are exposed to same temperature? There could be a lot of difference depending on how it's tested.