The coating of the inside of rebuilt hotrods or street rods with 30 mils of TC Ceramic. The reduction in heat and noise was significant. A test was done with a 1937 Chevy, metal body construction for heat reduction and decibel reduction.
Before coating, the fire wall temperature was 110F and the decibel level inside the car was 108 decibels. The whole inside was coated with 30 mils of TC Ceramic. The after coating the fire wall, the temperature was 95F and decibels were 96.
Ambient temperature was 70F. The temperature reduction was 15F or 37.5%. The decibel reduction was 12 decibels, which was about double what was expected. Both results were excellent for a coating of only 30 mils. (The thickness of 6 brand new dollar bills.)