The materials classified under this specification are: Mastic vibration damping materials used to reduce the sound emanating from metal panels. Mastic underbody coatings used to give protection and some vibration damping to motor vehicle underbodies, fenders, and other parts.
SAE J671-1997 history
2014SAE J671-2014 Vibration Damping Materials and Underbody Coatings
1997SAE J671-1997 Vibration Damping Materials and Underbody Coatings
1982SAE J671-1982 Vibration Damping Materials and Underbody Coatings@ Standard (April 1982)