The best replacement for tung oil is linseed oil.

The best alternatives to tung oil are rated as following:
★★★★★  linseed oil
★★★★  polyurethane
★★★★  danish oil
★★★  teak oil
★★  varnish
★★  tru oil
★★  stain
★  boiled linseed oil
★  mineral oil
★  shellac
★  waterlox
★  blo
★  tung oil finish
★  lemon oil
★  danish oil finish
  polyurethane finish
  water based polyurethane
  satin finish
  paste wax
  osmo
  linseed
  finishing oil
  teak
  beeswax

Your alternative for tung oil is not listed? Suggest!
Speaking about tung oil, one probably shouldn't forget about linseed oil.

Other search terms related to tung oil and their ratings are:
★★★★★ linseed oil
You have in mind a companion for tung oil and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tung oil in all years. Click on graph for more.
tung oil
linseed oil
polyurethane