Rigid Polyurethane Elastomer Specifications

This table includes discontinued items and their recommended alternatives.
Go back to the Current Products Only specification table.

                         
Mix
Ratio
(by wt.)
Mix
Ratio
(by vol.)
Gel Time
(min.)
@ 72°F
Demold
Time (hr.)
@ 72°F
Cast
Thick.
Hardness 
(Shore D)
Viscosity
(R/H or
Mixed (cps)
Density
(g/cc)
Volumetric
Yield
(in.3/lb.)
Shrink
(in./in.)
Compressive
Strength
(psi)
Flexural
Strength
(psi)
Flexural
Modulus
(psi)
Tensile
Strength
(psi)
Deflection
Temp (°F)*
Izod
Impact
(ft.lb./in.)
Cured
Color
RenCast 6486 (Disc. June 2022)
No direct alternative
100:50
1:1
7-8
8 hr.
1/8"
67
7,800/75
1.16
23.9
4,750
110,000
3,600
156
6.6
Amber
Freeman 1085 (Disc. June 2022)
Replaced by Freeman 1085HS
1:1
1:1
6
30-120
min.
3"
69
80
1.12
24.7
0.002
4,880
5,600
170,000
3,300
137
0.35
Beige
1:1
1:1
7
30 min.
3"
70
90
1.05
26.6
0.003
4,500
235,000
4,500
3.0
White
RenPIM 6405-1 (Disc. June 2022)
Replaced by Freeman 2075
1:1
90:100
45-55
24
75
220
1.13
24.5
0.001
6,400
6,600
4,900
0.71**
White
RenPIM 6495-1 (Disc. June 2022)
Replaced by Freeman 2075
1:1
90:100
45-55
24
75
190-300
1.13
24.5
0.0007
6,400
6,600
4,900
0.71**
Light Amber
1:1
1:1
20
2-4 hr.
3"
75
190
1.09
25.4
0.001
9,000
5,400
140
1.32
White
RenPIM 6450 (Disc. June 2022)
Replaced by Freeman 2450
80:100
67:100
45-65
15-30
77
170/1,600
1.13
23.9
23,100
7,000
184,000
4,900
208
0.90
Black
RenPIM 6452 (Disc. June 2022)
Replaced by Freeman 2450
80:100
67:100
50-70
15-30
79
30/1,600
1.15
24.1
18,000
8,500
198,000
4,900
179
0.84
Off-White
RenPIM 6460 (Disc. June 2022)
Replaced by Freeman 2450
80:100
67:100
50
10-15
80
170/1,500
1.18
23.5
24,500
7,900
174,000
5,300
1.00
Black
80:100
67:100
45-65
15-30
77
200/1,600
1.15
24
23,100
7,000
184,000
4,900
250
0.90
Black
RenCast 6432-1 (Disc. June 2022)
Replaced by Freeman 1070 & 1080
100:50
100:50
5-6
1-2 hr.
1/8"
72
50/1,100
1.13
24.7
0.005
7,200
8,600
234,000
5,600
163
0.6
Off White
100:92
1:1
3
15-30 min.
1/2"
70
80
1.05
26.6
0.010
3,650
4,500
132,000
3,000
140
Off White
115:100
1:1
20
2-4 hr.
1/2"
80
150
1.12
24.7
0.003
8,300
9,500
288,000
6,650
134
0.31
White
RenCast 6491 (Disc. June 2022)
No direct alternative
1:1
89:100
4-5
30-40
min.
1/8"
85
200/640
1.22
23
33,500
16,000
400,000
8,600
205
1.2
Off-White
RenCast 6458 (Disc. June 2022)
No direct alternative
100:85
1:1
50
15
86
75/400
1.21
22.9
14,100
16,500
432,000
10,200
129
0.87
Clear Amber
ASTM
D-2471
D-2240
D-2393
D-792
D-792
D-2566
D-695
D-790
D-638
D-790
D-648
D-256

*Deflection Temperature is the temperature when a 1/2" x 1/2" x 5" bar (supported at both ends) deflects 0.010 of an inch under a 66 psi fiber stress. The maximum service temperature may be far above this value depending on the application and the stress of the plastic at high temperature.
**Notched Izod