USC 21330 Feather-Rite is a lightweight autobody filler supplied in a one gallon can with blue cream hardener. Part Number: 21330. Q: Does 21330 include hardener?. The Feather-Rite lightweight autobody filler can also be referred to as lightweight body filler, autobody filler gallon, USC Feather-Rite filler, collision repair filler, and body repair filler.
