3M's Bondo logo
|Product type||Automotive body filler|
Before the 1940s, body solder was often used to repair large imperfections prior to painting. Solder repairs were conducted using a flame and wooden paddles covered in tallow or motor oil, which prevented the half-molten lead from sticking. After the war, automotive panels became thinner and larger, with a greater susceptibility to warping. The earliest 'plastic solder' can be traced to around 1940, a do-it-yourself solution to panel beating.
This gave the consumer the ability to attempt reasonably priced and long lasting repairs. These early fillers were epoxy-based and one part, drying by out gassing. The most notable early filler was called Black Magic (body filler), and was popular before Bondo's introduction. Bondo, a two-part (resin with hardener added) mix of talc and plastic, was introduced in 1955. It was developed by World War II veteran and automotive repair shop owner Robert Merton Spink of Miami, Florida.
- "Robert Merton Spink > Obituary". legacy.com. 2010-10-04. Retrieved 2014-03-26.