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  • Polyurethane Characteristics
  Handling Properties
Product Number Description Hardness Ratio by Weight Mixed Viscosity Pot Life Time To Harden Cure
- cps @ 77°F  77°F/100gm @ 77°F  -
501 General purpose laminating system to produce dimensionally stable patterns and molds. 80 6:1 5,200 30 Min. 90 Min. RT
503 High heat resistance with service temps to 500°F. Can be post cured unsupported as the material does not reliquify during PC. 91 12:1 18,000 80 Min. 145 Min. PC
504 Amber-clear system for general purpose tooling applications. Can also serve as binder to aggregate, sand and other fillers. 72 4:1 1,000 17 Min. 90 Min. RT
507 Low viscosity general purpose laminating stystem with excellent wet out of reinforcements 85 5:1 2,200 30 Min. 90 Min. RT
533 Low viscosity --- medium temperature laminating system. Tools canbe post cured free standing giving flexibility in master material. 82 9:1 4,100 50 Min. 120 Min. PC

 

Typical Cured Properties
Part Number HDT Compressive Strength Tensile Strength Shrinkage Specific Gravity in.³/lb. Color
°F  psi psi in./in. - - -
501 210(1) 30,000(1) 24,400(1) .0001(1) 1.53 17.87 Blue
503 580(1) 45,000(1) 80,000(1) .0002(1) 2.00 14.0 Black
504 133 15,500 2,000 .0003(1) 1.10 24.9 Amber
507 195(1) 39,000(1) 26,000(1) .0001(1) 1.21 23.3 White
533 300 34,000 26,000 .0002(1) 1.38 20.1 Gray
Test Method (ASTM) (648) (695) (638) (2566) (792) (792-66) Visual
 
Legend:  (1) Laminate Measurement.
  Handling Properties
Product Number Description Hardness Ratio by Weight Mixed Viscosity Pot Life Time To Harden Cure
- cps @ 77°F  77°F/100gm @ 77°F  -
401 General purpose chip resistant surface coat giving a fast tack free time and excellent non-sag properties. 85 7:5:1 22,000 30 Min. 65 Min. RT
403 High abrasion resistant and impact resistant surface coat. Non-machinable. 90 9.5:1 14,000 42 Min. 45 Min. RT
404 High abrasion resistant and impact resistant surface coat. Can be cast to ½" thick. 88 15:1 29,000 45 Min. 80 Min. RT
408 High HTD with use temperatures between 300°F and 400°F . Will harden at room temperature allowing for free standing post cure. 92 14:1 55,000 120 Min. 210 Min. PC
415 Thixotropic surface coat with excellent compatability with plaster for PFP molds. Excellent hang up properties and machinable. 85 6:1 11,900 17 Min. 56 Min. RT
433 High HDT surface coat designed to go with Epoxical 333 casting system and 533 Laminating systems. 90 10:1 19,000 30 Min. 60 Min. PC
Test Method (ASTM) (2040) Calculated (2393) (2471) Visual Calculated

 

Typical Cured Properties
Part Number HDT Compressive Strength Tensile Strength Shrinkage Specific Gravity in.³/lb. Color
°F  psi psi in./in. - - -
401 135 15,000 4,500 .0002 1.52 18.2 Blue
403 140 15,000 4,500 .0001 1.68 16.5 Blue-Gray
404 150 18,000 7,000 .0022 1.94 14.3 Black
408 320 22,000 6,000 .0003 2.16 12.8 Black
415 140 13,000 4,700 .0001 1.39 19.9 White
433 300 21,000 4,400 .0002 1.58 17.43 Gray
Test Method (ASTM) (648) (695) (638) (2566) (792) (792-66) Visual
Handling Properties
Product Number Description Hardness Ratio by Weight Mixed Viscosity Pot Life Time To Harden Cure
- cps @ 77°F  77°F/100gm @ 77°F  -
301 Variable thickness room imgserature casting system. The system features low shrinkage combined with the ability to cast up to 3/4". 85 12:1 7,000 65 Min. Depends on Mass RT(1)
301/731 Longer pot life version of 301. 80 9:1 6,800 90 Min. RT(1)
301/308 Further extended pot life version of 301 with additional cast thickness variations up to 5". 75 7:1 6,600 120 Min. RT(1)
303 Iron filled casting system designed for accurate thin or thick film casting. 90 10:1 6,500 35 Min. RT
303/703 Longer pot life version of 303 system. 85 10:1 4,000 90 Min. RT
305 Iron filled mass casting resin system for castings from 2" to 5" in thickness. 60 9:1 21,000 60 Min. RT
308 Iron filled mass casting resins system for castings for pouring masses up to 8". 75 13:1 71,000 45 Min. RT
310 Medium temperature mass casting resin for cast molds requiring service temperatures of 200°F. Castings to 3". 89 9:1 7,500 150 Min. RT/PC
312 Low viscosity casting system for thickness from 1/8" to 3/4". Useful for surface casting repairs to laminated RT tools. 74 3:1 3,000 56 Min. RT
333 Hardens at room temperature for free standing post cure. HDT values of 300°F for high temperature exotherm and/or parts. 89 14:1 18,000 60 Min. PC
Test Method (ASTM) (2040) Calculated (2393) (2471) Visual Calculated

 

Typical Cured Properties
Part Number HDT Compressive Strength Tensile Strength Shrinkage Specific Gravity in.³/lb. Color
°F  psi psi in./in. - - -
301 135 13,500 4,500 .002 2.03 14.0 Aluminum
301/731 130 13,500 4,500 .003 1.90 15.0 Aluminum
301/308 128 13,500 4,500 .005 1.85 15.0 Aluminum
303 135 16,500 7,200 .0005 1.68 16.6 Black
303/703 130 18,000 6,600 .0004 1.68 16.5 Black
305 120 10,000 4,600 .0009 1.94 14.3 Black
308 132 13,000 4,800 .0008 2.58 10.7 Black
310 200 16,000 6,300 .0045 1.53 18.1 Aluminum
312 122 20,386 6,000 .0005 1.34 20.65 White
333 350 41,250 11,700 .0005 1.90 14.6 Aluminum
Test Method (ASTM) (648) (695) (638) (2566) (792) (792-66) Visual

 Legend:  (1) May be post cured for increased HDT values.

  Handling Properties
Product Number Description Hardness Ratio by Weight Mixed Viscosity Pot Life Time To Harden Cure
- cps @ 77°F 77°F/100gm @ 77°F -
600 Pattern putty which can be formed and machined for pattern design and repair 35 1:1 Paste 16 Min. 30 Min. RT
603 Pilled trowelable system which carves like mahogany with traditional wood working tools. Excellent "hang" properties. 53 6:1 Paste 70 Min. 150 Min. RT
606 One of three general purpose bonding adhesives with variable pot life characteristics. 85 1:1 Paste 24 Min. 45 Min. RT
Test Method (ASTM) (2040) Calculated (2393) (2471) Visual Calculated

 

Typical Cured Properties
Part Number HDT Compressive Strength Tensile Strength Shrinkage Specific Gravity in.³/lb. Color
°F psi psi in./in. - - -
600 114 4,000 2,400 .001 .75 37.4 Brown
603 124 5,250 2,300 .003 .97 28.57 Aluminum
606 130 11,800 4,500 .0009 1.44 18.8 Gray
Test Method (ASTM) (648) (695) (638) (2566) (792) (792-66) Visual

Part Number<>

825

835

840

850

864

880

6015

7020

7224

8007

985

986

Hardness Shore

A

25

35

40

50

65

80

-

-

-

-

-

-

D

-

-

-

-

-

-

60

70

72

80

85

85

Color

Visual

Amber

Brown

Beige

Black

Brown

Amber

Light Amber

Brown

Opaque

Clear

Gray

Aluminum

Ratio

by Weight

100:19

100:15

100:100(v)

100:20

100:22

100:29

50:100

100:60

100:100

100:85

100:100

100:100

Mixed Viscosity

cps @ 77°F

4800

760

1600

5000

3800

3900

2200

2000

300

400

1950

2650

Gel Time

77°F min.

25

60

60

25

30

40

20

21

24

3

10

15

Work Life

77°F min.

15

35

30

15

25

35

15

14

20

2

5

10

Demold Time

77°F hours

24

24

24

12

24

12

16

16

4

1

1

2

Shrinkage

in./in.

.0022

.0033

.002

.0022

.0035

.0005

.001

.0010

.001

.007

.0008

.001

Tensile Strength

psi

1050

660

575

1250

1025

2120

3200

5000

5000

5880

6700*

6400

Elongation

%

840

380

425

970

700

500

225

175

22

30

N/A

N/A

Tear Strength

lbs./lin. In.

160

85

65

185

280

340

450

540

350

510

N/A

N/A

Pounds per Cubic Inch<>

.039

.036

.042

.039

.039

.037

.038

.038

.038

.038

.060

.058

Pounds per Gallon<>

8.95

8.32

9.75

8.96

8.98

8.55

8.78

8.78

8.81

8.82

13.85

13.35

Hardness ranges may vary with other measured properties depending upon cure time, temperature, humidity, and mass of casting. Values reported are averages. The above materials represent a sample listing of our room temperature curing casting elastomers. Epoxical Inc. invites your interest in specific material requirements not listed in the above chart.

Part Number Pounds per Cubic Inch Pounds per Gallon Characteristics
825 .039 8.95 Very flexible and tough with high tear resistance.
835 .036 8.32 Low viscosity flexible system for excellent detail reproduction.
840 .042 9.75 Low viscosity and easy to use 1:1 mix ratio.
850 .039 8.96 Excellent tensile and elongation and good rebound properties.
864 .039 8.98 High tear in a low durometer material. Excellent potting material.
880 .037 8.55 Very tough with good resilience. Good detail reproduction.
6015 .038 8.78 High tensile and tear with good detail reproduction.
7020 .038 8.78 Good tensile and tear properties, with abrasion resistance.
7224 .038 8.81 High tensile with an excellent detail reproduction. Ideal prototype material.
8007 .038 8.82 Optically clear casting elastomer for prototype parts.
985 .060 13.85 Fast Cast System.
986 .058 13.35 Machinable Fast Cast System.