will it work if i make exhaust gasket for a car from couple layers of aluminum?
It willIt may not last long though, and a couple layers of foil isn't a very thick gasketI have used sheet aluminum such as roof flashing, house siding and even beer cans as gaskets on tractorsThey do workYou might do better, if you use your foil, to also use the high heat Perma-tex (red) silicone tooCoat both side with that, then snug up the bolts and walk away for at least 24 hours, 48 is betterThat stuff really holds tight for a long time.
