Aqua Cast Water Based Casting Compound

Buying Options

Quantity Image Name Price
Aqua Cast Sealer 200ml Aqua Cast Sealer 200ml
In stock
Aqua Cast Water Based Casting Compound 10kg Aqua Cast Water Based Casting Compound 10kg
In stock
Aqua Cast Water Based Casting Compound 15kg Aqua Cast Water Based Casting Compound 15kg
Sold Out
Aqua Cast Water Based Casting Compound 3kg Aqua Cast Water Based Casting Compound 3kg
In stock


It's an environmentally friendly casting compound made from powder and polymer which only needs the addition of water to make beautiful homeware.

With Aqua Cast you can make coasters, decorative vases, planters, candle holders, soap dishes and many other great items. You can colour it with our resi-TINT acrylic inks,

or our pearlescent pigment powders or other water-based pigments.

The guide mix ratio is 100 : 35 (100 parts powder to 35 parts water, or 2.8 : 1)


  • Is Aqua Cast weatherproof and waterproof?  No, it is porous when cured. For external applications and those where the article will hold water it will need to be sealed. We recommend our range of  hydroflow Sealers
  • How hard and durable is Aqua Cast?  It is extremely tough and durable. Once cured Aqua Cast cures to a hardness of 208 MPa (Brinell) The compressive strength is 55 Mpa when mixed in the guide ratio of 100:35.
  • Will it fade with exposure to sunlight?  No this product is 100% UV stable.
  • Is it fire-resistant?  Yes, Aqua Cast does not self-ignite nor propagate flame. It is suitable for creating candle holders and fireplaces.

Mixing the powder

The desired viscosity & consistency can be controlled to suit the application. Alterations to the guide powder to water ratio will affect the product performance, particularly in terms of drying time. Measure the desired amount of water, add the corresponding quantity of powder gradually during mixing. For example:

  • 100g powder to 35g/ml water
  • 150g powder to 52g/ml water
  • 200g powder to 70g/ml water
  • 300g powder to 105g/ml water
  • 500g powder to 175g/ml water
  • Mix by hand or with an electric mixing blade for 2-4 minutes until uniform and smooth. Add pigments at the mixing stage to obtain the desired colour shade. The mixed solution will rapidly become creamy and lump free, tap the mixing container to help remove trapped air. 


    Immediately pour into your mould and allow to settle. Any residual bubbles can be popped by agitating or tapping the mould. Allow to harden for 60-90 minutes before demoulding (temperature and mix ratio dependent). Allow to dry for 24-48 hours to build cured strength.


SKU 334

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