“Temperature-indicator safety coating” means a coating formulated and labeled as a color-changing indicator that is:

1. (a) Used to monitor the temperature and safety of a substrate, underlying piping, or underlying equipment; and
2. (b) Applied to substrates exposed continuously or intermittently to temperatures above 204°C, equivalent to 400°F.

Source. #8695, eff 7-27-06, ss by #10736, eff 1-1-15 (formerly Env-A 4202.01(bm)); ss by #14202, eff 2-26-25