How to Make Polymer Crystals

Written by renee gerber
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How to Make Polymer Crystals
Experiment to make your own varieties of polymer crystals. (Crystals in Glass image by Vanessa van Rensburg from

Polymer crystals are an important additive to many of household items, including plants, diapers and cooling headbands used by athletes. With the right ingredients and a few polymer crystals, you can make some of your own. You can even grow your own polymer plants.

Skill level:

Things you need

  • Water
  • Water-Gel Crystal granules
  • Food colouring (optional)
  • Zipper-lock plastic bag
  • Measuring spoon
  • Container or jar

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  1. 1

    Using a measuring spoon, measure out 1/4 tsp of polymer crystals and place them into a zipper-lock plastic bag.

  2. 2

    Add a full 236ml. of tap water to the bag of polymer crystals and seal the plastic zipper-lock bag.

  3. 3

    Repeat the previous two steps, but add 227gr. of distilled water this time around. Put the contents in a new plastic zipper-lock bag.

  4. 4

    Place 29.6ml. of Water-Gel Crystals to a container or jar and add 1 gallon of water to it.

  5. 5

    Let the Water-Gel Crystals sit overnight, or for 8 hours.

  6. 6

    Strain the crystals that formed in the water and let them dry for two hours.

Tips and warnings

  • As an optional step, add food colouring to your polymer crystal creation to create a beautiful variety that you will enjoy displaying in or on plants.
  • Be aware that the use of hard water with Water-Gel Crystals will create fewer polymer crystals. Soft water is better if you want a greater amount of crystals.

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