Ultracal 30 is ideal for making castings with fine deail. When cured it is 5-1/2 times harder than regular casting plaster.
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The 'Ultimate' in casting stone materials. UltraCal 30 is rated 5-1/2 times the hardness of regular casting plasters allowing incredibly fine castings without chipping or breaking when removing from the mold. A super fine silicate picks up the finest details in the most intricate molds with sharp undercuts and difficult to achieve textures. Mix 1:1 with water until slurry and pour into mold. 20 minutes later you have a ROCK!
WARNING: CHOKING HAZARD-Small parts. Keep away from children under 3 years of age Hobby Products are not designed for use by children under 14 years of age Carefully study the packaging materials and documentation associated with any product purchased for applicable warnings