The best replacement for sealer is primer.

The best alternatives to sealer are rated as following:
★★★★★  primer
★★  stain
★★  varnish
★★  impregnator
★  enhancer
★  primer on drywall
★  sealant
★  stain deck
★  wood conditioner
★  flex seal
★  teak oil
★  waterproofer
★  epoxy primer
  epoxy paint
  mist coat
  primer first
  just primer
  undercoat
  primer paint
  grout sealer
  coal tar
  stain for decks
  penetrating sealer
  tile sealer

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

Other search terms related to sealer and their ratings are:
★★★★★ enhancer
★★★★ grout
★ stain
shrink tunnel
You have in mind a companion for sealer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sealer in all years. Click on graph for more.
sealer
primer
stain