“Etching filler” means a coating that contains less than 23 percent solids by weight and at least 0.5-percent acid by weight, which is used instead of applying a pretreatment coating followed by a primer.

Source. (See Revision Note at chapter heading for Env-A 1200) #9933, eff 6-1-11; ss by #12899, eff 10-17-19