First thing Just ran out to the car tried to the turn off the air bag light doing the procedure it didnt work for me what am I doing wrong?2nd to answer your question Yes it was a expanding foam.
It was called Air Conditioner Coil Cleaner
On the back of the bottle it said it cleans automobile radiators ect.
Yes this evaporator was caked with about 1/3 junk on it. Real hard to clean.
I still think the air could be cooler but Im not sure. Hard to tell I know it is blowing way better.