Headgaskets Aluminum Heads

Mopar has a spray coating that you sprayed on Neon head gaskets when upgrading to the mls. I did it first on my '96.

I never had a lick of head gasket trouble with that combo, and I once looked down while jamming along on the freeway to see the temp needle fully pegged and no steam from the car because it was bone dry in the cooling system (radio was blasting so I didn't hear the alarm)

I had to pour water down the spout in little sprinkles and stand back while it belched boiling hot water and steam back out at me. I'm amazed it didn't crack the block doing that, but it finally cooled it off enough to fill it, which I did and drove away. Went on to put another 250k on that engine and the head gasket never wept or leaked, even after that.
New thermostat gasket and I was gtg.