Hard Rock Die Stone High Expansion Gypsum 33LB

The material is compatible with all types of impression materials. Its high expansion makes it especially suited for polyvinyl or polyether impression materials. This material has a creamy and thixotropic consistency for good flow under vibration, yet is very stackable. Its extended working time facilitates multiple pours. The stone has a smooth non-brittle surface so dies trim easily without chipping.

Physical Properties:

Water/Powder Ratio: 21 mL/100 g

Working Time: 6 - 8 minutes

Setting Time: 15 minutes

Setting Expansion: .28%

Compressive Strength, Wet (1 hour): 7,000 psi

Compressive Strength, Dry (48 hrs.): 15,000 psi (104 MPa)