502-30
502-30 is a 30 Shore A silicone elastomer filled with nickel-coated graphite, available as a ready-to-mold compound, fully cured electrically conductive sheet stock, and, for select formulations, in continuous roll form. It delivers a volume resistivity of 0.125 ohm-cm (1.5 max specification) and a thermal stability range of -60°C to 200°C. Tensile strength is 182 psi and elongation is 900%.
Key Properties
- Durometer / Hardness (Shore A): 30 (25–35 range)
- Tensile Strength: 182 psi (100 minimum)
- Elongation: 900% (400 minimum)
- Volume Resistivity: 0.125 ohm-cm (1.5 max)
- Specific Gravity: 1.71
- Thermal Stability Range: -60°C – 200°C
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Color | Black | — |
| Specific Gravity (Report) | 1.71 | — |
Mechanical Properties
| Property | Value | Test Method |
| Shore A (25–35 range) | 30 | — |
| Tensile psi (100 minimum) | 182 psi | — |
| Elongation % (400 minimum) | 900% | — |
Thermal Properties
| Property | Value | Test Method |
| Thermal Stability Range | -60°C – 200°C | — |
| Thermal Conductivity | 0.5 W/m·K | — |
Electrical Properties
| Property | Value | Test Method |
| Volume Resistivity ohm-cm (1.5 max) | 0.125 ohm-cm | — |
Environmental Performance
| Property | Value | Test Method |
| Shelf Life — Uncatalyzed | Indefinite (may need freshening after 1–2 years) | — |
| Shelf Life — Catalyzed | 6 months | — |
- Highly conformable EMI/RFI shielding gaskets requiring low closure force
- Electrically conductive seals for electronic enclosure interfaces demanding a soft, compliant elastomer
- Press-molded conductive components for custom EMI shielding geometries
- Sheet stock die-cut shielding gaskets for commercial electronics and enclosures
- Conductive elastomeric seals in applications requiring thermal stability from -60°C to 200°C
Common industries: Electronics, telecommunications, defense, industrial equipment, medical devices.
502-30 is the softest durometer grade in the 502-series of nickel-coated graphite filled silicone shielding elastomers, with a Shore A hardness of 30 (25–35 range). It is designed for EMI/RFI shielding applications where a highly conformable, electrically conductive elastomer is required.
The material is available in three supply forms — ready-to-mold compound, fully cured electrically conductive sheet stock, and, for select formulations, continuous roll — providing flexibility across fabrication methods. Data was generated using ASTM test methods and procedures with the Varox catalyst system.
The compound delivers 182 psi tensile strength, 900% elongation, a specific gravity of 1.71, and a volume resistivity of 0.125 ohm-cm. Thermal conductivity is 0.5 W/m·K and the thermal stability range is -60°C to 200°C. Raw material is available catalyzed and ready for press cure molding. 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 502-30 from 502-40 and 502-65?
502-30 is the softest grade in the 502-series at 30 Shore A (25–35 range), making it the most conformable and lowest closure force option. It offers the highest elongation in the series at 900% versus 800% for 502-40 and 530% for 502-65. Its volume resistivity of 0.125 ohm-cm is within the 1.5 max specification. 502-40 steps up to 40 Shore A with shielding effectiveness data reported, and 502-65 is the firmest grade at 65 Shore A with a higher tensile strength of 240 psi.
Why is compression set critical for this material?
As a conductive elastomeric shielding gasket material, 502-30 must maintain intimate contact with mating surfaces throughout its service life to sustain electrical conductivity and shielding performance. Compression set resistance ensures the gasket does not permanently deform under sustained closure load, preserving the conductive interface and the required volume resistivity of 0.125 ohm-cm over time. No compression set value is listed on the TDS for this grade.
What is the thermal stability range for 502-30?
The thermal stability range for 502-30 is -60°C to 200°C as listed on the TDS.
Is 502-30 suitable for regulated or military environments?
No compliance standards or military specifications are listed on the manufacturer's TDS for this material.
How should 502-30 be specified?
Specify grade (502-30), supply form (compound, sheet stock, or roll), thickness, compliance requirements, dimensional tolerances, and finished format.
