Hydrostone Powder

Hydro-Stone gypsum cement is an extremely hard plaster material with a very high compressive strength.

Make your masters for moulds or finished products. We use this for all our carved masters we make the silicone moulds from.

Especially suitable where high strength and resistance to wear are necessary. It is used in high-quality art and novelty castings, molds, figurines, modeling material, as well as anchoring material, density fill applications, lamp bases, and die production.

Hard and strong with high water absorption resistance.

Ideal for patterns, figurines, commercial casts, and sculpture. It is not for making outer or mother molds, and it is not recommended for outdoor use.

Designed for strength and casting detail. Hydrostone is 40% to 50% harder than casting plaster and works much like plaster in mixing, pouring, and setting.

Works well in silicone moulds, plaster and most flexible moulding compounds. Used in high-quality art novelty and statuary castings.

Extremely fine detail duplication (see the details on the succulent leaves image, it even picked up the tiny dots).

Low viscosity slurry for filling multiple moulds at one time.

Works well in most mold materials, especially flexible molds.

It has an expansion about two times greater than Hydrocal, and has a fully cured dry strength of 10,000psi.

Mix Ratio: Approximately 1:3, eg100gms water to 300gms Hydrostone, although this can vary
Set time: 19-25 minutes

To use: Blend 3 parts Hydrostone powder to 1 part water, the mix should be just able to  be poured out, too thick - just add a little more water, mix well, pour into mould and tap to remove air bubbles. Allow to set. Will firm up over 24 hours but can be removed from mould once set. Can be polished and carved. If using master regularly you can also spray varnish to add further strength.

Tip: When mixing it can initially look very thick, keep blending before adding more water as it does liquify up through work time.

SAFETY NOTE: Always wear gloves, mask and eye protection, do not ingest the powder, keep out reach of children. If spilt on benches wipe up immediately with damp cloth - do not allow to set as it will turn into stone. Protect benches and floors when using.
Renascent cannot be held liable for any damages that occur by using this powder.

Used in accordance with material safety data sheet hydrostone is the strongest gypsum available it is used for figurines moulds lamp bases simulated stone material and models it's high compressive strength and tight surface texture makes it the ideal product for high-quality figurines