Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 211 - DEFINITIONS AND GENERAL PROVISIONS
Subpart B - DEFINITIONS
Section 211.985 - Chemical Milling Maskant

"Chemical milling maskant" means a coating that is applied directly to aluminum components to protect surface areas when chemical milling the component with a Type I or II etchant. Type I chemical milling maskants are used with a Type I etchant and Type II chemical milling maskants are used with a Type II etchant. This definition does not include:

bonding maskants;

critical use and line sealer maskants;

seal coat maskants;

maskants that must be used with a combination of Type I or II etchants and any of these maskants (i.e., bonding, critical use and line sealer, and seal coat); or

maskants that are listed as aerospace specialty coatings in 35 Ill. Adm. Code 219.204(r)(2).