502F-50
502F-50 is a 50 durometer fluorosilicone elastomer filled with nickel-coated graphite, available as a ready-to-mold compound, fully cured electrically conductive sheet stock, continuous extrusion profiles, and, for select formulations, continuous rolls. It delivers shielding effectiveness of >113 dB (100 MHz–10 GHz, E-field), a volume resistivity of 0.015 ohm/cm (0.1 max), and a thermal stability range of -55°C to 200°C. Data was generated using ASTM test methods and procedures with the Varox catalyst system.
Key Properties
- Hardness Shore A (45–55 range): 51 (ASTM methods per TDS)
- Tensile Strength (100 minimum): 130 psi
- Elongation % (200 minimum): 477%
- Volume Resistivity ohm/cm (0.1 max): .015 ohm/cm
- Specific Gravity: 2.13
- Thermal Stability Range: -55°C – 200°C
We want to help!
Enter your information and we'll get you in touch with our knowledgable staff. We know how important to the right product for your project.
Request a Consultation
- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Color | Dark Gray | — |
| Specific Gravity (Report) | 2.13 | — |
Mechanical Properties
| Property | Value | Test Method |
| Shore A (45–55 range) | 51 | — |
| Tensile psi (100 minimum) | 130 psi | — |
| Elongation % (200 minimum) | 477% | — |
| Tear “B” ppi (25 min) | 33 | — |
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 | — |
| Shielding Effectiveness 100 MHz–10 GHz (E-Field) | >113 dB | — |
Environmental Performance
| Property | Value | Test Method |
| Shelf Life — Uncatalyzed | Indefinite (may need freshening after 1–2 years) | — |
| Shelf Life — Catalyzed | 6 months | — |
- Conformable EMI/RFI shielding gaskets requiring low closure force and fluorosilicone chemical resistance to fuels and solvents
- Conductive elastomeric seals for enclosures exposed to fuels, oils, or hydraulic fluids where a soft, compliant gasket is required
- Extruded conductive profiles for continuous shielding applications in chemically aggressive environments
- Press-molded conductive components for custom fluorosilicone shielding geometries
- Conductive seals requiring shielding effectiveness from 100 MHz to 10 GHz across a -55°C to 200°C thermal range
Common industries: Aerospace, defense, electronics, industrial equipment, automotive.
502F-50 is the softest grade in the 502F-series of nickel-coated graphite filled conductive fluorosilicone elastomers, at 50 Shore A (45–55 range). The fluorosilicone base provides enhanced resistance to fuels, oils, and solvents compared to standard silicone grades, making 502F-50 suitable for EMI shielding gasket applications in chemically demanding environments where a soft, conformable elastomer is required.
It is available in the broadest range of supply forms in the 502F-series — ready-to-mold compound, fully cured sheet stock, continuous extrusion profiles, and, for select formulations, continuous rolls. Data was generated using ASTM test methods and procedures with the Varox catalyst system.
The material achieves 130 psi tensile strength, 477% elongation — the highest elongation in the 502F-series — and a Tear “B” of 33 ppi (25 min specification). Shielding effectiveness is >113 dB, measured from 100 MHz to 10 GHz (E-field) — a lower frequency bound than the 200 MHz start point used for 502F-60 and 502F-80. Uncatalyzed shelf life is indefinite (may need freshening after 1–2 years); catalyzed shelf life is 6 months. Cold storage will extend shelf life.
What differentiates 502F-50 from 502F-60 and 502F-80?
502F-50 is the softest and most conformable grade in the 502F nickel-coated graphite fluorosilicone series at 50 Shore A (45–55 range), with the highest elongation at 477%. Its shielding effectiveness is measured from 100 MHz to 10 GHz — a broader frequency range starting one decade lower than the 200 MHz lower bound used for 502F-60 and 502F-80. It uses the Varox catalyst system versus DBPH for the harder grades. The single typical-value data table on its TDS contrasts with the three-column Typical/Sheets/Rolls format of 502F-60.
Why is compression set critical for this material?
As a conductive elastomeric shielding gasket material in chemical environments, 502F-50 must maintain intimate contact with mating surfaces to sustain shielding effectiveness of >113 dB and volume resistivity of 0.015 ohm/cm over 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-50?
The thermal stability range for 502F-50 is -55°C to 200°C as listed on the TDS.
Is 502F-50 suitable for regulated or military environments?
No compliance standards or military specifications are listed on the manufacturer's TDS for this material.
How should 502F-50 be specified?
Specify grade (502F-50), supply form (compound, sheet stock, extrusion profile, or roll), thickness, compliance requirements, dimensional tolerances, and finished format.
