USG® Plaster and Gypsum Cements Specifications

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Mix Ratio
Parts Water
(by weight) per
100 Parts Plaster
Set Time
(Min.)
% Setting
Expansion
Maximum
Approximate
Density (lb./ft.3) Wet
Approximate
Density (lb./ft.3) Dry
Compressive
Strength (psi) Dry
USG Industrial Plasters
70
27-37
0.20
99.00
69.00
2,000
65
27-37
0.22
100.00
72.50
2,400
70
27-37
0.21
99.00
69.00
2,000
66
27-37
0.22
101.00
72.50
2,400
62
27-37
0.22
102.00
75.00
2,900
USG Gypsum Cements
38
25-35
0.08
115.00
99.00
6,000
Ultracal 60 (Discontinued)
39
75-90
0.07
114.40
97.50
5,000
Hydrocal A-11
42
16-20
0.12
112.50
93.80
5,500
44
25-35
0.11
111.20
91.60
4,500
45
25-35
0.39
110.60
90.00
5,000
Hydrocal FGR-95
30
50-70
112.00
101.60
32
17-20
0.24
119.40
108.70
10,000