Saint Gobain Formula RM1042 Casting Plaster (Plaster of Paris) From  £6.00

When mixed with silica in equal quantities, this plaster makes an excellent mould body which is fire-resistant and doesn't crumble in the kiln. It doesn't stick to the glass and washes off easily. Great!

Worth paying the little bit extra for this plaster over pottery plaster. Smoother, harder, longer lasting and the best bit is that when you mix it it is not full of tiny air bubbles. I'm converted.

Took me a while to work out the water to plaster ratio (70% plaster / 30% water)... even then it drys very fast, so I have to add a little more water.

Does a fantastic job once you are confident in the mix ratio.

Havn't had a chance to use product yet but looks like it should work fine, was delivered fast and was decently priced, thanks

Very pleased with the service. The plaster was easy to mix, no lumps and set well should make a great mould once it has dried out.

Excellent easy to use, and great quality when set, picks up fine detailing, very pleased, and highly recommend this product

Love this finer blend of power.
I'm able to achieve some great pieces.
Happy to have found this supplier.

I've used many variations of plaster and this one works perfectly for me at a good price

Perfect for every project. easy to use. all instructions provided.

Good price, good quality plaster - I use it to make press moulds, works well

good quality, does its job, good price, nice white quick setting plaster

Brilliant fine plaster to capture details when casting glass

Great quality

good results when used to make molds

I'm sure the product is fine...it's in customs awaiting approval....it's been weeks