Bondo (putty)

Bondo (putty)

Bondo is a brand of two-part putty manufactured by 3M. Originally used mainly for automobile body repair, Bondo has been widely used by carpenters to repair wood. The Bondo brand of filler or putty is composed of a polyester resin that, when mixed with a hardener (an organic peroxide) or catalyst, turns into a putty which then sets and hardens. The user can apply the mixed Bondo body filler, sand it to the proper shape, and prime and paint it like the material around it. The term "Bondo" is a registered trademark in the United States and in many countries throughout the world.