The best replacement for caulk is grout.

The best alternatives to caulk are rated as following:
★★★★★  grout
★★★★  sealant
★★★  silicone
★★  spackle
★★  wood filler
★  grout around tub
★  putty
★  plumbers putty
★  grout first
★  grout between tub and tile
★  grout shower
★  grout corners
★  foam
★  grout in shower
★  grout bathtub
★  grout shower corners
  spray foam
  adhesive
  silicone shower
  caulking
  silicon
  silicone sealant
  silicone caulk
  joint compound
  acrylic caulk
  glazing compound
  glazing
  unsanded caulk
  mastic
  latex caulk
  expanding foam
  adhesive caulk
  unsanded
  putty window
  caulk
  glaze
  regular caulk

Your alternative for caulk is not listed? Suggest!
Speaking about caulk, one probably shouldn't forget about painters tape.

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



Google Trends

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