The best replacement for sealant is wax.

The best alternatives to sealant are rated as following:
★★★★★  wax
★★★★★  caulk
★★★★  filling
★★★  adhesive
★★  glaze
★★  stain
★★  wax first
★★  sealer
★★  silicone
★  gasket
★  varnish
★  teflon tape
★  grout
★  sealant
★  carnauba wax
★  plumbers putty
  flowable composite
  silicone sealant
  prr
  caulking
  car wax
  polyurethane sealant
  pipe compound
  klasse
  gasket maker

Your alternative for sealant is not listed? Suggest!
Speaking about sealant, one probably shouldn't forget about backer rod.

Other search terms related to sealant and their ratings are:
★★★★★ backer rod
★★★ ust
★★★ ust tires
You have in mind a companion for sealant and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sealant in all years. Click on graph for more.
sealant
wax
caulk