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Plâtre CALCAST 100

Calcast 100 is an extremely fine white plaster produced from natural gypsum.  It is suitable for the production of art objects, decorative elements and general moulding applications.

8,8024,02 TTC  


Calcast 100 is designed as a multi-functional plaster that can be used as a filler and mould making material.

It can be used to create architectural and decorative ornaments, for frames, textural coatings, as a stucco plaster, or for making creative objects of all kinds.

This plaster is very suitable for mould making. For example, for clay casting, due to the high moisture absorption of ß-plasters. Or for making moulds for bronze parts.

You can also use it to pour cement and similar products and then cut it out.

For greater mechanical strength, you can reinforce your plaster with burlap or oakum.

If you wish to cast plaster in a plaster mould, cover the mould with black soap to enable it to be demoulded.


The mixing ratio for calcast 100 is 18 litres of water to 25 kg of gypsum, i.e. 720 ml to 100 g of plaster.

Measure the exact quantity of water and gypsum, and sprinkle the powder into the water.

Leave to soak for a few minutes or more depending on the nature of the operation.

Then mix thoroughly.  For larger quantities, mix with mechanical means.

After checking that the mould is watertight, proceed to pour the homogeneous mixture.

In order to avoid air bubbles, pour the mixture into the mould in a thin stream.

Demoulding can be done after a few hours depending on the temperature of the part. 


Mixing ratio: 18 litres of water for 25 kg of gypsum (720 ml for 1 kg)

Working time: 10 minutes

Setting time: ca. 15 minutes

End of setting: ca. 35 min

Colour: white

Compressive strength after 28 days: 12 MPa

Storage: at room temperature in a dry place

Safety data

The product is not harmful under normal conditions of use and does not contain any substances harmful to the environment. During use wear protective clothing. In case of contact with skin or eyes, rinse with plenty of water and seek medical advice if necessary.


Orders placed before 3pm will be processed and dispatched no later than the next working day (valid for products available to Belgium, France, the Netherlands, Germany and Luxembourg). Shipping costs for quantities of + 40kg outside Belgium must be calculated on a custom basis and will not be included in your order. You live in another country or you want to order more than 40kg to France, the Netherlands, Germany or Luxembourg? Contact us for a personal quote!


More info

Do you have a specific product, a packaging that you cannot find on our website or a question about your project? Do not hesitate to contact us or to come to our shop in order to access our complete range and to benefit from our personalized advice. We will be happy to help you!

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