The best replacement for epoxy resin is polyester resin.

The best alternatives to epoxy resin are rated as following:
★★★★★  polyester resin
★★★  fiberglass resin
★★  phenolic resin
★★  epoxy glue
★  polyresin
★  fibre glass resin
★  vinyl ester resin
★  polyester
  resin
  acrylic resin
  casting resin
  fibreglass resin

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

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



Google Trends

Scale is based on the average worldwide traffic of epoxy resin in all years. Click on graph for more.
epoxy resin
polyester resin
fiberglass resin