"Solid film lubricant" means, for purposes of 35 Ill. Adm. Code 219.204(r), a very thin coating consisting of a binder system containing as its chief pigment material one or more of the following: molybdenum, graphite, polytetrafluoroethylene (PTFE), or other solids that act as a dry lubricant between faying (i.e., closely or tightly fitting) surfaces in aerospace applications.
Ill. Admin. Code tit. 35, § 211.6064