If you wish to collect in store or visit, then email info@arachnidfx.com to arrange. We are located in

Unit C2, Metropoint Business Park, Swords, Co. Dublin

Odyssey Studios, Corcanree Business Park Dock Road, Limerick

Prop rentals, 3d printing, custom sculpts, mold making and casting...the list goes on!

If you need professional quality work then get in touch via


Crystacal R is a formulated hemihydrate plaster (CaSO4.1/2H2O) produced from naturally occurring high purity gypsum mineral.  

White in colour, Crystacal R plaster is used to make hard casts with fine reproduction of detail. It is used in the manufacture of glass-reinforced-gypsum (GRG) structures, decorative plasterwork, giftware, dental models, and more.


When stored under dry conditions and in its original packaging, Crystacal R plaster has a specified shelf life of 9 months, that commences from the date of manufacture that is printed on each sack.


Plaster/Water Ratio: 100/35

Working Time: 15 Minutes

Demould Time: 18 Minutes

Expansion: 0.4%

Compressive Strength: 55 Mpa

Shelf Life: 9 Months


Crystacal R