Mineral casting powder for mould-made decorative objects. Choose a pack size to see what is included, then explore the material, process and specifications below.
Start with a small project.
£19.99
Contents: One 1 kg bag of FormCast casting powder.
Material: mineral casting powder mixed with water.
Equipment: accurate scales, a mixing container, a mixing tool and a suitable mould.
Use: decorative indoor objects. Follow the mixing, handling and finishing guidance supplied with your bag.
More material for your next ideas.
£47.99
Contents: One 5 kg bag of FormCast casting powder.
Material: mineral casting powder mixed with water.
Equipment: accurate scales, a mixing container, a mixing tool and a suitable mould.
Use: decorative indoor objects. Follow the mixing, handling and finishing guidance supplied with your bag.
Two bags for a growing making practice.
£83.99
Contents: Two 5 kg bags of FormCast casting powder.
Material: mineral casting powder mixed with water.
Equipment: accurate scales, a mixing container, a mixing tool and a suitable mould.
Use: decorative indoor objects. Follow the mixing, handling and finishing guidance supplied with your bag.
Four bags for your workshop.
£149.99
Contents: Four 5 kg bags of FormCast casting powder.
Material: mineral casting powder mixed with water.
Equipment: accurate scales, a mixing container, a mixing tool and a suitable mould.
Use: decorative indoor objects. Follow the mixing, handling and finishing guidance supplied with your bag.
Our formula, developed for makers
A smooth mineral casting material designed for making objects in moulds. Add water, mix, pour and finish.
We have been developing the balance between flow, mould detail, surface quality and finished strength around the way people actually make at home and in the studio.
FORMCAST+ / DEVELOPED BY HAND AND FORMFrom bag to object
Measure powder and water for a repeatable mix.
Bring it together until smooth.
Fill your mould and let the material settle.
Leave it to set for 25 to 30 minutes, then demould.
Sand, colour and finish the piece in your own way.
Specifications + questions
Figures from the FormCast+ pack. Timings vary with temperature, mix ratio and thickness.
Three things from home: digital kitchen scales that read in grams, water (distilled if you can) and a protected, level table. You also need a mixing cup, a spatula and a silicone mould, which come in our kits or can be added separately.
A smooth mineral casting powder for making objects in moulds. You weigh it, mix it with water, pour it and demould after 25 to 30 minutes.
Yes. There are no special skills: weigh, mix for about a minute, pour, then wait. Our free beginner's guide walks you through your first piece step by step.
Less than you might think. The powder can be dusty, so pour it gently and cover your table. Wet mix wipes off with a damp cloth before it sets. Let leftover mix harden in the cup and put it in the bin, never down the sink.
Yes, with sensible care. Work in a ventilated room, avoid breathing the dust and keep it away from your eyes. Keep the powder away from children and pets, and don't use finished pieces for food or drink. Full safety notes are printed on the bag.
If you weigh carefully and wait the full 25 to 30 minutes before demoulding, your first piece should come out cleanly. A few small bubbles or a soft edge are normal at first, and the guide shows how to avoid them next time.
Email us a photo and tell us what you did, and we'll help you fix it. If the powder itself is at fault, we'll replace it or refund it. Unopened items are also covered by our 60-day return guarantee.
Weigh both. 3 parts powder to 1 part water gives the most fluid mix and the finest detail. 4 parts powder to 1 part water gives the strongest piece. The mix calculator on this page does the maths.
Yes. Pigment+ goes into the water before the powder. Once fully cured, after 24 to 48 hours, it can be sanded, sealed or left as it is.
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