Cast Epoxy Insulators
Choose Epoxy for Superior:
- Wear
- Crack and Shatter Resistance
- Electrical Insulating
- Adhesion to Metal and Wood
- Chemical Resistance
- Impact strength
- Design intricacy options
- Value
-
Sealing

Products:
- Standoffs 5 to 20 Kv
- Bushings: Wire and Studded
- Low Voltage Bushing
- Low Voltage Secondary
- Insulating Sleeves, Bus Bar Supports, Tubes, Flanges, Spacers
- Replacement Components, Part Replication
- Encapsulating and Potting
- Window Bushings
- Custom and Standard Products
- In House Mold Manufacturing
- Small and Large Volume
Three Different Types of Cast Epoxy
Acid Anhydride
- Recommended for both large and small electrical casting applications
- Demonstrates excellent Mechanical Strength
- 94V-0 – UL listed
Amine Cure
- Demonstrates excellent Mechanical Strength
- Suitable for use in Oil Filled Transformers
- Recommended for use in casting or potting small electrical components, Transformer Bushings and Insulators.
Cycloaliphatic
- Demonstrates excellent mechanical strength
- Suitable for use with Oil-Filled Transformers
- Recommended for use in casting or potting both small and large electrical components, Transformer Bushings and Insulators
- Good weathering characteristics
| Engineering Data | |||
| Name | Acid Anhydride | Amine Cure | Cycloaliphatic |
| Color | Grey | Red or Grey | Red or Grey |
| Hardness (Durometer) | 92D | 92D | 92D |
| Tensile Strength, PSI | 6,000 | 8,000 | 8,000 |
| Flexural Strength, PSI | 10,000 | 17,000 | 15,500 |
| UL-RTI Rating | 130º C | NA | NA |
| Dielectric Strength (0.125") | 400 v/mil | 400 V / Mil | 420 V / Mil |
| Dielectric Constant @ 23º C, 103 Hz | 4.0 | 4.0 | 4.0 |
| Dissipation Factor @ 23º C, 10³ Hz | 0.010 | 0.0193 | 0.010 |
| Volume Resistivity @ 23º C, ohms-cm | 2.0 x 1014 | 3.0 x 10¹⁴ | 5.0 x 10¹⁴ |
| Material Meets UL-Flammability Rating | 94 V-O (1/4" thickness) | NA | NA |
Unless otherwise indicated, all properties published are based on tests performed on standard ASTM test samples and according to ASTM test methods. Values shown are for test samples made from production materials and they are believed to be conservative. No warranty is to be construed, however, in fabricated or molded form, parts may vary considerably from this standard test data. Where specific or unusual applications arise, test should be made on actual parts, and test procedures agreed upon between Haysite Reinforced Plastics and the customer.
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