The best replacement for mud is spackle.

The best alternatives to mud are rated as following:
★★★★★  spackle
★★★★  all terrain tires
★★★  mush
★★  moo
★★  dirt
★★  plaster
★  bait safari zone
★  mmorpg
★  miracle mud
★  joint compound
★  slush
★  sand
★  thinset
★  all terrain
★  cement board
★  pud
  place beyond the pines
  mineral mud
  mudd
  dsb
  joe blasco
  cold mud
  sand refugium
  live sand

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

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



Google Trends

Scale is based on the average worldwide traffic of mud in all years. Click on graph for more.
mud
spackle
all terrain tires