One of the hardest and strongest of all gypsum cements, Hydrostone is recommended for producing high-quality novelty and statuary castings requiring extremely hard surfaces. This product is self-leveling when poured.

                       
Water/Powder Ratio
26-28ml/100g
                       
Working Time
                       
20-25 minutes
                       
Setting Time
                       
30 minutes
                       
Setting Expansion
                       
0.25%
                       
Compressive Strength (1hr)
                       
8,000psi
                       
Compressive Strength (Dry)
                       
10,000psi