"Putty" A paste used to glue parts together or fill voids. Bondo is body putty for autos. You can purchase a variety of putties for use on boats that help you achieve different results or perform different functions. You can add various fillers to gelcoat and resin to make your own putties. I think West Marine user guide has a section on using their fillers to make epoxy putties. I make a putty from resin,cabosil,milled fibers,and talc to fill large voids. Bill Potter once told me that when he owned Seacraft they bought a couple of old industrial kitchen mixers or some other machine to make their putty. It's the stuff you see when you try to remove the liner and aft livewell.
