502F-80
502F-80 is an 80 durometer nickel-coated graphite filled fluorosilicone elastomer, supplied as ready-to-mold compound, fully cured conductive sheet stock, continuous extrusion profiles, or, for some formulations, continuous rolls. It delivers shielding effectiveness of >113 dB (200 MHz–10 GHz, E-field) per MIL-DTL-83528, a volume resistivity of 0.015 ohm/cm (0.1 max per ASTM D991), and a thermal stability range of -55°C to 200°C. With a Tear “B” of 90 ppi and tensile strength of 290 psi, it is the highest durometer and highest tear resistance grade in the 502F-series. Data was generated with the DBPH catalyst system.
Key Properties
- Hardness Shore A (75–85 range): 80 (ASTM D2240)
- Tensile Strength (200 minimum): 290 psi (ASTM D412)
- Elongation % (100 minimum): 200% (ASTM D412)
- Volume Resistivity ohm/cm (0.1 max): .015 ohm/cm (ASTM D991)
- Specific Gravity: 2.37 (ASTM D792)
- Thermal Stability Range: -55°C – 200°C
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Color | Dark Gray | — |
| Specific Gravity (Report) | 2.37 | ASTM D792 |
Mechanical Properties
| Property | Value | Test Method |
| Shore A (75–85 range) | 80 | ASTM D2240 |
| Tensile psi (200 minimum) | 290 psi | ASTM D412 |
| Elongation % (100 minimum) | 200% | ASTM D412 |
| Tear “B” ppi (50 min) | 90 | ASTM D624 |
Thermal Properties
| Property | Value | Test Method |
| Thermal Stability Range | -55°C – 200°C | — |
Electrical Properties
| Property | Value | Test Method |
| Volume Resistivity ohm/cm (0.1 max) | .015 ohm/cm | ASTM D991 |
| Shielding Effectiveness 200 MHz–10 GHz (E-Field) | >113 | MIL-DTL-83528 |
Environmental Performance
| Property | Value | Test Method |
| Shelf Life — Uncatalyzed | Indefinite (may need freshening after 1–2 years) | — |
| Shelf Life — Catalyzed | 6 months | — |
| Shelf Life — Cured | Indefinite | — |
- EMI/RFI shielding gaskets requiring maximum mechanical rigidity and tear resistance in a fluorosilicone conductive elastomer
- Conductive elastomeric seals for enclosures exposed to fuels, oils, or hydraulic fluids where a firm, dimensionally stable gasket cross-section is required
- Extruded conductive fluorosilicone profiles for high-wear continuous shielding applications in chemically aggressive environments
- Press-molded conductive components for custom fluorosilicone shielding geometries requiring the highest Shore A in the 502F-series
- Conductive seals operating across a thermal range of -55°C to 200°C where maximum tear resistance is a design requirement
Common industries: Aerospace, defense, electronics, industrial equipment, automotive.
502F-80 is the highest durometer grade in the 502F-series of nickel-coated graphite filled conductive fluorosilicone elastomers, at 80 Shore A (75–85 range). The TDS identifies it as “The 502F-80.” It is supplied as ready-to-mold compound, fully cured conductive sheet stock, continuous extrusion profiles, or, for some formulations, continuous rolls.
As the firmest grade in the series, it achieves the highest Tear “B” of 90 ppi (50 min specification, ASTM D624) and the highest specific gravity of 2.37, while maintaining the same volume resistivity of 0.015 ohm/cm and shielding effectiveness of >113 dB (200 MHz–10 GHz, E-field per MIL-DTL-83528) as 502F-50. Data was generated with the DBPH catalyst system.
The material delivers 290 psi tensile strength and 200% elongation (at the 100 minimum specification). The fluorosilicone base provides resistance to fuels, oils, and solvents. Shelf life for uncatalyzed material is indefinite (may need freshening after 1–2 years); catalyzed shelf life is 6 months; cured shelf life is indefinite. Cold storage will extend shelf life of catalyzed base.
What differentiates 502F-80 from 502F-50 and 502F-60?
502F-80 is the firmest grade in the nickel-coated graphite fluorosilicone series at 80 Shore A (75–85 range), delivering the highest Tear "B" of 90 ppi (50 min specification) and the highest specific gravity of 2.37. Its elongation minimum of 100% is lower than 502F-50 (200 min) and 502F-60 (200 min), reflecting the stiffer compound. Like 502F-60, it uses the DBPH catalyst system and measures shielding effectiveness from 200 MHz. Unlike 502F-60, its TDS presents a single typical-value column with no separate sheet or roll data breakdown.
Why is compression set critical for this material?
contact with mating surfaces in chemically aggressive environments to sustain shielding effectiveness of >113 dB and volume resistivity of 0.015 ohm/cm throughout its service life. Compression set resistance ensures the gasket does not permanently deform under sustained closure load, preserving the conductive interface. No compression set value is listed on the TDS for this grade.
What is the operating temperature range for 502F-80?
The thermal stability range for 502F-80 is -55°C to 200°C as listed on the TDS.
Is 502F-80 suitable for regulated or military environments?
No compliance standards or military specifications are listed on the manufacturer's TDS for this material. Shielding effectiveness data was measured per MIL-DTL-83528 method.
How should 502F-80 be specified?
Specify grade (502F-80), supply form (compound, sheet stock, extrusion profile, or roll), thickness, compliance requirements, dimensional tolerances, and finished format.
