Bondo is a brand of two-part putty manufactured by 3M. In 1955, the first batch of Bondo was made by mixing talc and polyester resin in an old dough machine. Later that year, the Bondo body-filler was born. Though originally used mainly for automobile body repair, Bondo is also widely used by carpenters for repairing wood defects not exposed to weather. Bondo is composed of a polyester resin. When the resin is mixed with a hardener (an organic peroxide) or catalyst, it 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 surrounding material. The term "Bondo" is a registered trademark in the United States and in many countries throughout the world.
Body fillers were developed as a replacement for body solder, or molten lead, that was formerly used for the same task. Body solder is much more durable, but may require more effort to apply. Lead-based solder poses toxic hazards for people and the environment due to the heavy metal components. Although Bondo body fillers and other polyester body fillers are far safer to work with than their lead-based counterparts, they can still pose significant health risks. The fumes are toxic.
Home and hobby
3M distributes Bondo "All Purpose Putty" which may be used on wood, asphalt, masonry, metal, drywall and tile.
Bondo brand fiberglass fillers are used in the marine industry. A glass-reinforced filler, resin, resin repair kit and long-strand glass hair are the types of fillers manufactured.
- Bondo (putty) at Google Books
- Bondo (putty), p. 30, at Google Books
- Bondo (putty), p. 153, at Google Books
- "3M Canada > Bondo > Resources > FAQ". Solutions.3mcanada.ca. Retrieved 2013-05-30.