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Polyacrylamide Gel Crystals


In Stock

$4.90 in_stock
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  • 10 $4.41
Quick Overview:
These polyacrylamide crystals can absorb about 300 times their density of water.
Ages 13+

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WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.

More Information

Polyacrylamide Gel Crystals


Water gel crystals, also known as water jelly crystals and superabsorbent polymer, are able to absorb up to 400 times their weight in water. Place 1/4 teaspoon (1g) of these small 2-4mm crystals in a quart of water, let it sit overnight, pour off the excess water and you will have over 2 cups of beautiful, large 1-2" jelly-like clear crystals. By adding food coloring to the water, you can change the color of your water gel crystals! You get a 4 oz. package (112g) of 2-4mm crystals which is enough to make about 14 gallons of fully hydrated water gel crystals.

The super absorbent polymer in water gel crystals has many uses. It is used in landscaping and agriculture to help retain soil water in dry climates, it is used for environment spill cleanup, it is used as an oil well drilling fluid, and it is even used to make soft contact lenses, to name just a few. Water gel crystals are also used around the home to improve water retention in potted plants, add a decorative touch to vases of cut flowers, and create floating candle arrangements. However, it's the cool scientific uses of water gel crystals that get us excited! Here are just a few examples: they can be used for hydroponics (growing plants without soil), studying root growth by planting seeds in a clear container filled with water gel, and experimenting with diffusion, absorption, and refraction. They are also useful to provide a clean water source for pet reptiles and insects.

These water gel crystals are a cross-linked acrylamide and potassium polyacrylate co-polymer. It is non-toxic but should be handled carefully as with all chemicals. Use water gel crystals carefully once contacted with water as they are extremely slippery.

Customer Reviews

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Best Crystals, will buy again! Review by
These are the best quality crystals I have bought online. You get so much crystals for the low price and if you hydrate them with bottled or filtered water they grow even bigger! I have used them for countless science demonstrations, party decorations and favors for kids, and I use them as a water source for my crickets and bugs.
Great Service Review by
The product was used for a home school science demonstration. The product worked very well. It was also delivered as expected and the price was reasonable. I was very pleased with this purchase.
Perfect Service and Great Value Review by
Came just as I expected it. Was looking for a substitute for Soil Moist Water Retention Crystals (a very expensive option if you need a large quantity). Not only is it a better value (even with shipping costing the same as the item- to Canada I might add) it arrived WAY before I expected it. Very Happy with this purchase.

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