Introduction: How to Make Galaxy Slime

Picture of How to Make Galaxy Slime

Galaxy slime is a super easy update to a regular borax-free slime recipe: just add glitter! I love this slime recipe because it's so customizable and fool-proof.

The key to this slime is using clear school glue as the base: it will make your galaxy slime gorgeous and iridescent.

This slime is perfect for sensory play or a quick science craft - it comes together quickly and cleans up in no time. Keep on reading to learn how to make your own galaxy slime at home!

Step 1: Tools + Ingredients

Picture of Tools + Ingredients


  • 5 oz bottle Elmer's Clear School Glue
  • 1 tablespoon baking soda
  • 2 teaspoons saline contact solution (needs to have some kind of boric acid)
  • Food coloring
  • Superfine glitter in various colors (this is the set I bought)


  • Bowl for mixing
  • Measuring spoons
  • Spoon for mixing
  • Small airtight container for storing (optional)

Step 2: Mix the Glue and Baking Soda Together

Picture of Mix the Glue and Baking Soda Together

Dump the entire bottle of glue into a bowl and add one tablespoon of baking soda.

Stir well until the mix is homogenous and there are no dry spots left.

Step 3: Add the Food Coloring

Picture of Add the Food Coloring

I decided to mix violet and black food coloring to get the right color!

It's a good idea to make this mixture VERY saturated in color. This is because the colors will lighten a little once you knead the slime.

Step 4: Add the Glitter

Picture of Add the Glitter

And now for the best part: glitter! I used a variety of colors and kept adding and mixing until I liked the way it looked.

I'd say I added less than a teaspoon of glitter here - try not to go too over the top with it as it can make the slime "chunky" if you add too much.

Make sure the glitter is mixed in well and move on to the next step. :D

Step 5: Add the Saline Contact Solution

Picture of Add the Saline Contact Solution

Add one teaspoon of contact solution and mix well. The slime will begin to form!

Add the second teaspoon of contact solution and mix again. At this point, the slime will begin to clump up and pull away from the sides of the bowl. Keep mixing until it comes together and looks like the second photo.

Step 6: Kneading + Cleaning Up

Picture of Kneading + Cleaning Up

The slime will be a little sticky and wet at first, but kneading it will remedy that!

Work the slime between your hands and on a clean surface for a couple minutes. As you knead, the slime will become soft, shiny and stretchy.

To clean up your bowl and utensils, use the slime! Press the blob of slime against any bits of slime residue and they will come away easily. :)

Step 7: Storing Your Slime

Picture of Storing Your Slime

This slime can be played with multiple times if stored in an airtight container. I bought a pack of small plastic containers to store all the slime I've been making lately!

The slime will begin to lose elasticity as it ages, but you can bring some of it back by kneading and stretching it before play time. You may also notice the slime "leaking" the contact solution, but that can be kneaded in as well.

Enjoy your slime! And make sure to post pictures in the comments below if you make it. :D


schittly (author)2017-06-24

Everytime I touch this slime my hands turn blue. It just can't keep the colour - what did I do wrong?

OctavioB (author)2017-06-19

I need this .. nicely done, well explained!

DmitriyU2 (author)2017-06-19

Any ideas to replace Elmer's glue?

ChristinaA21 (author)DmitriyU22017-06-19

Any water based glue with PVA in it - UHU Bastelkleber, Cleopatre, Giotto collage, woodworking glues, "Holzleim".... or guargum

the way - you allways need borax for this kind of slime - here it comes
with the saline solution in form of boric acid (it is needed as part of
the pH-puffer-system)

the benefit is you can hardly overdose the borax in this way, so you are probably on the saver side

DmitriyU2 (author)ChristinaA212017-06-19

Thank you,
very comprehensive answer!

vbanaszak (author)2017-06-18

Awesome! I look forward to trying this. Perfect timing too. I think school supplies are coming in now :D

Penolopy Bulnick (author)2017-06-15

Yay for glitter!

About This Instructable




Bio: I work at instructables by day, and turn into a stitch witch by night. follow me on instagram @makingjiggy to see what i'm working ... More »
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