Sealer
Sealer means a high solids, high viscosity material, generally, but not always, applied in the paint shop after the body has received an electrodeposition primer coating. The primary purpose of sealers is to fill body joints completely so that there is no intrusion of water, gases or corrosive materials into the passenger area of the body compartment. Also referred to as sealants.
Source
40 CFR § 63.3176
Scoping language
Terms used in this subpart are defined in the CAA, in the General Provisions of this part, and in this section as follows: