The best replacement for slime is fix a flat.

The best alternatives to slime are rated as following:
★★★★★  fix a flat
★★★★  stans
★★★  mushroom
★★  element mh3u
★★  ride on
★★  deviljho
★★  goo
★  magma cube
★  brachydios
★  goop
★  tifa
★  haruhi
★  silly putty
★  tnt
★  slime
★  felicia
★  gak
  flubber
  putty
  no slime
  airlock
  fix a-flat
  mushrooms

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

Other search terms related to slime and their ratings are:
★★★★★ borax
★ presta valve
★ polyvinyl alcohol
★ eyeballs
★ glue and laundry detergent
elmer's glue and borax
You have in mind a companion for slime and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of slime in all years. Click on graph for more.
slime
fix a flat
stans