Hard Rock

High-Strength, High-Expansion Die Stone

ISO Type 5

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
0.28%
Compressive Strength, Wet (1hr.)
7,000 psi (49 MPa)
Compressive Strength, Dry (48 hrs.)
15,000 psi (104 MPa)
Item No. Description
Aqua
330001 Hard Rock Aqua 33#/15KG
Green
32077 Hard Rock Green 120 - 70 g Package
330002 Hard Rock Green 33#/15KG
Ivory
330003 Hard Rock Ivory 33#/15KG