BISCO® EC2265
BISCO® EC2265 is a carbon black filled solid silicone material with a Shore A hardness of 65 ±5, available in six standard thicknesses from 0.031″ to 0.250″ with a glossy smooth surface finish. It acts as a low amperage conductor and provides protection against electrostatic discharge (ESD), with an electrical conductivity of 5 ohm•cm per ASTM D991 and a temperature range of -80°F to 437°F. Tensile strength is 754 psi and compression set is 26% at 70 hours @ 302°F @ 25% per ASTM D395.
Key Properties
- Durometer, Shore A: 65 ±5 (ASTM D2240)
- Tensile Strength: 754 psi (ASTM D412)
- Elongation: 260% (ASTM D412)
- Compression Set, 70 Hours @ 302°F @ 25%: 26% (ASTM D395)
- Specific Gravity: 1.17 g/cc (ASTM D297)
- Temperature Range: -80°F to 437°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.031″, 0.063″, 0.094″, 0.125″, 0.188″, 0.250″ | — |
| Base Polymer | Solid Silicone | — |
| Color | Black | — |
| Surface Finish | Matte | — |
| Specific Gravity | 1.17 g/cc | ASTM D297 |
Mechanical Properties
| Property | Value | Test Method |
| Durometer, Shore A | 65 ±5 | ASTM D2240 |
| Tensile Strength | 754 psi | ASTM D412 |
| Elongation | 260% | ASTM D412 |
| Tear Resistance | 46 ppi | ASTM D624 |
| Compression Set, 70 Hours @ 302°F @ 25% | 26% | ASTM D395 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Range | -80°F to 437°F | — |
Electrical Properties
| Property | Value | Test Method |
| Electrical Conductivity | 5 Ohm•cm | ASTM D991 |
- ESD protection gaskets and seals for electronic enclosures housing handheld devices, PCBs, and module housings
- Static discharge protection for automotive and EV electronic control units and battery modules
- Conductive seals for industrial instrumentation cabinets and manufacturing control systems requiring static dissipation
- ESD-safe sealing components for telecommunications and medical devices operating in static-prone environments
- Static reduction seals for cold supply chain packaging and equipment requiring ESD protection in low-temperature environments
Common industries: Electronics, automotive, electric vehicles, industrial controls, telecommunications, medical devices, cold supply chain.
BISCO® EC2265 is a carbon black filled electrically conductive solid silicone designed to act as a low amperage conductor and provide protection against electrostatic discharge. Unlike the nickel-coated graphite and metal particle-filled grades in this product family, EC2265 uses carbon black filler to achieve a dissipative electrical conductivity of 5 ohm•cm — a level appropriate for ESD protection rather than broadband EMI/RFI shielding.
It is available in six standard thicknesses (0.031″, 0.063″, 0.094″, 0.125″, 0.188″, and 0.250″) with a glossy smooth surface finish, the widest standard thickness range of any grade in this product group.
The material delivers 754 psi tensile strength — the highest tensile value in this conductive elastomer product group — 260% elongation, a tear resistance of 46 ppi (ASTM D624), and a specific gravity of 1.17 g/cc (ASTM D297) — the lowest specific gravity in the group, reflecting the light carbon black filler versus heavy metal particle fillers in other grades. Compression set is 26% at 70 hours @ 302°F @ 25% per ASTM D395. The temperature range is -80°F to 437°F.
What differentiates BISCO® EC2265 from the EMI/RFI shielding grades in this product group?
EC2265 uses carbon black filler to achieve a dissipative electrical conductivity of 5 ohm•cm, making it a low amperage conductor designed for ESD protection — not broadband EMI/RFI shielding. The nickel-coated graphite and metal particle-filled grades in this family target volume resistivities of 0.005 to 1.0 ohm-cm for shielding effectiveness of >90 to >145 dB. EC2265 has the highest tensile strength in the group at 754 psi and the lowest specific gravity at 1.17 g/cc, reflecting its carbon black filler versus the heavy metal particles in shielding grades.
Why is compression set critical for this material?
As an ESD protection seal, EC2265 must maintain continuous contact with mating surfaces to preserve the conductive path that dissipates static charge. Compression set resistance ensures the material does not permanently deform under sustained closure load, maintaining the dissipative contact interface. Compression set is 26% at 70 hours @ 302°F @ 25% per ASTM D395, characterizing long-term recovery behavior at elevated temperature.
What is the operating temperature range for BISCO® EC2265?
The temperature range for BISCO® EC2265 is -80°F to 437°F as listed on the TDS.
Is BISCO® EC2265 suitable for regulated environments?
No compliance standards are listed on the manufacturer's TDS for this material.
How should BISCO® EC2265 be specified?
Specify grade (BISCO® EC2265), thickness, compliance requirements, dimensional tolerances, and finished format.
