2486
2486 is a 70 durometer fluorosilicone elastomer filled with silver-plated aluminum particles, meeting the requirements of MIL-DTL-83528 Type D and listed on the M83528 Qualified Product List (QPL), Notification of Qualification VQ (VQH-16-029974). It is available in thicknesses of 1/64″, 1/32″, 1/16″, 3/32″, 1/8″, 3/16″, and 1/4″, and is identified on the TDS as a replacement for Parker Chomerics CHO-SEAL® 1287. Shielding effectiveness is >90.8 dB (20 MHz–10 GHz, E-field) and volume resistivity is 0.0016 ohm-cm, both per MIL-DTL-83528.
Key Properties
- Hardness Shore A: 74 (ASTM D2240)
- Tensile Strength: 340 psi (ASTM D412)
- Elongation: 112% (ASTM D412)
- Volume Resistivity (Pressure Probe): 0.0016 ohm-cm (MIL-DTL-83528)
- Specific Gravity: 2.19 (ASTM D792)
- Thermal Stability Range: -154.58°F / -51.7°F (TR-10 / TR-70, ASTM D1329)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 1/4″, 3/16″, 1/8″, 3/32″, 1/16″, 1/32″, 1/64″ | — |
| Durometer | 70 | — |
| Color | Tan or Dark Blue | — |
| Specific Gravity | 2.19 | ASTM D792 |
Mechanical Properties
| Property | Value | Test Method |
| Hardness Shore A | 74 | ASTM D2240 |
| Tensile Strength | 340 psi | ASTM D412 |
| Elongation | 112% | ASTM D412 |
| Tear Strength Type C | 52 ppi | ASTM D624 |
| Compression Deflection @ 100 psi | 17.8% | MIL-DTL-83528 |
| Compression Set @ 25% Deflection | 7.4% | ASTM D395B |
| Low Temperature Retraction, TR-10 and TR-70, °F | -154.58 / -51.7 | ASTM D1329 |
Thermal Properties
| Property | Value | Test Method |
| Low Temperature Retraction, TR-10 and TR-70, °F | -154.58 / -51.7 | ASTM D1329 |
Electrical Properties
| Property | Value | Test Method |
| Volume Resistivity (Pressure Probe) | 0.0016 ohm-cm | MIL-DTL-83528 |
| Shielding Effectiveness 20 MHz–10 GHz (E-Field) | >90.8 dB | MIL-DTL-83528 |
| Electrical Stability After Break | 0.0025 ohm-cm | MIL-DTL-83528 |
| EMP Survivability | 0.004 ohm-cm | MIL-DTL-83528 |
| Electrical Stability During and After Vibration | 0.0047/0.0015 ohm-cm | MIL-DTL-83528 |
| Volume Resistivity After Life Testing (1000 hrs) | 0.0028 ohm-cm max | MIL-DTL-83528 |
| Volume Resistivity After Life Testing (48 hrs) | 0.0049 ohm-cm max | MIL-DTL-83528 |
Environmental Performance
| Property | Value | Test Method |
| Fluid Immersion | Pass | MIL-DTL-83528 |
Compliance
- MIL-DTL-83528 — Compliant (Type D)
- M83528 Qualified Product List (QPL) — Listed (Defense Logistics Agency), VQ (VQH-16-029974)
- EMI/RFI shielding gaskets for military-grade electronic enclosures and avionics systems requiring fuel and oil resistant fluorosilicone construction
- Conductive elastomeric seals for RF shielding in radar, communication, and satellite systems exposed to chemical environments
- Grounding and shielding for connectors, flanges, and panel-to-chassis interfaces in defense applications
- Sealing and shielding in high-reliability aerospace, naval, and missile systems where fluorosilicone base is required
- Drop-in replacement for Parker Chomerics CHO-SEAL® 1287 in QPL-specified assemblies
Common industries: Defense, aerospace, naval, military electronics, avionics, radar and communications systems.
2486 is a silver-plated aluminum filled fluorosilicone shielding elastomer designed to meet MIL-DTL-83528 Type D specifications. As a fluorosilicone base, it provides enhanced resistance to fuels, oils, and hydraulic fluids compared to standard silicone grades, making it particularly suited to aerospace, naval, and defense environments where chemical exposure is a concern.
The product is QPL-listed under Notification of Qualification VQ (VQH-16-029974) and is Made in the USA. It is identified as a direct replacement for Parker Chomerics CHO-SEAL® 1287 material.
The material achieves 340 psi tensile strength, 112% elongation, and a Tear Strength Type C of 52 ppi (ASTM D624). Compression Set at 25% deflection is 7.4% (ASTM D395B) and Compression Deflection at 100 psi is 17.8% per MIL-DTL-83528. Electrical stability has been characterized through EMP survivability (0.004 ohm-cm), vibration (0.0047/0.0015 ohm-cm), and life testing at both 1000 hours (0.0028 ohm-cm max) and 48 hours (0.0049 ohm-cm max), all per MIL-DTL-83528. Fluid Immersion passes MIL-DTL-83528.
Compliant with MIL-DTL-83528 Type D — Part of the M83528 Qualified Product List (QPL) from the Defense Logistics Agency (DLA).
What differentiates 2486 from 2368, 2569, 2571, and 2573?
2486 is the only fluorosilicone base grade in the group filled with silver-plated aluminum (MIL-DTL-83528 Type D), replacing CHO-SEAL® 1287. Its fluorosilicone base provides enhanced resistance to fuels, oils, and hydraulic fluids versus the standard silicone of 2568 and 2571. Shielding effectiveness is >90.8 dB — lower than the silver-plated copper grades — and compression set at 25% deflection is 7.4% (ASTM D395B). It is uniquely characterized with both TR-10 and TR-70 low temperature retraction values.
Why is compression set critical for this material?
In military-grade EMI shielding gasket applications, 2486 must maintain intimate contact with mating metal surfaces across its service life and environmental exposure range to sustain both sealing and shielding performance per MIL-DTL-83528 Type D. Compression set at 25% deflection is 7.4% (ASTM D395B), confirming the gasket's ability to recover and maintain its cross-section and conductive interface under sustained clamping load.
What is the operating temperature range for 2486?
Low Temperature Retraction TR-10 is -154.58°F and TR-70 is -51.7°F per ASTM D1329. No upper thermal stability limit is listed on the TDS for this grade.
Is 2486 suitable for military and regulated environments?
Yes. 2486 meets MIL-DTL-83528 Type D requirements and is listed on the M83528 Qualified Product List (QPL) from the Defense Logistics Agency (DLA), Notification of Qualification VQ (VQH-16-029974). It is Made in the USA.
How should 2486 be specified?
Specify grade (2486), thickness, color (Tan or Dark Blue), MIL-DTL-83528 Type D compliance requirements, dimensional tolerances, and finished format.
