The best replacement for bondo is fiberglass.

The best alternatives to bondo are rated as following:
★★★★★  fiberglass
★★★★  wood filler
★★★  lead
★★  body filler
★★  evercoat
★★  jb weld
★★  spackle
★  bondo glass
★  minwax
★  duraglas
★  weld
★  fiberglass bondo
  metal filler
  bondo gold
  minwax wood filler
  wood putty
  all metal
  putty
  fiberglass resin
  rage gold
  filler
  herculiner
  marine tex

Your alternative for bondo is not listed? Suggest!
Speaking about bondo, one probably shouldn't forget about fiberglass.

Other search terms related to bondo and their ratings are:
★★★★★ fiberglass
★★★ fiberglass repair
★★ resin
★ fiberglass resin
You have in mind a companion for bondo and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bondo in all years. Click on graph for more.
bondo
fiberglass
wood filler