Conductive rubber testing service

Conductive Rubber Testing Service for Global Electronics and Industrial Compliance

As an ISO/IEC 17025 accredited laboratory, we deliver a specialized conductive rubber testing service that verifies electrical conductivity, volume and surface resistivity, electromagnetic shielding effectiveness, mechanical durability, thermal stability, and chemical safety of conductive elastomers. Our conductive rubber testing service supports manufacturers and exporters of EMI gaskets, conductive seals, pressure-sensitive pads, electrodes, and static-dissipative components who must demonstrate conformity to ASTM, ISO, IEC, EN, and regional electronics and industrial standards across the European Union, North America, East Asia, and the Middle East. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, electronics OEMs, and procurement teams worldwide.

Product Samples We Regularly Test in Our Conductive Rubber Testing Service

Nickel-graphite filled silicone rubber gaskets and sheets — for EMI shielding, grounding, and static dissipation in electronic enclosures
Silver-plated glass or silver-plated aluminum filled conductive elastomers — for high-performance EMI gaskets in aerospace, telecom, and medical devices
Carbon-black loaded nitrile, EPDM, and fluoroelastomer seals — for conductive sealing in fuel systems, sensors, and industrial equipment
Conductive rubber keypads and pressure-sensitive pads — for remote controls, keyboards, and touch-sensitive switches
Conductive rubber electrodes and sensor elements — for medical monitoring, electrotherapy, and industrial sensing
Anti-static and conductive rubber rollers, belts, and profiles — for printing, packaging, and cleanroom material handling
Custom-formulated conductive rubber compounds and molded parts — with defined hardness, conductivity, and environmental resistance

Electrical Conductivity and Resistivity Testing for Conductive Rubber

Volume resistivity per ASTM D991 and ISO 1853 — the conductive rubber specimen is placed between guarded electrodes under controlled pressure, and the resistance through the bulk material is measured to calculate volume resistivity in ohm·cm, verifying the specified conductivity class for grounding, shielding, or static dissipation.
Surface resistivity per ASTM D257 and IEC 60093 — a concentric ring electrode or two-point probe measures the electrical resistance across the rubber surface under defined humidity, classifying the material as conductive, static dissipative, or insulative for the intended application.
Resistance uniformity and anisotropy mapping — multiple measurements are taken across the molded part and in different directions to detect variations caused by filler dispersion, flow orientation, or cure gradients that could create localized hot spots or shielding gaps.
Contact resistance and interfacial impedance per ASTM D991 and customer protocols — the resistance between the conductive rubber and a mating metal or conductive substrate is measured to ensure reliable electrical connection in gaskets, seals, and electrodes.
Resistance stability after compression, flexing, and thermal cycling — the conductive rubber is subjected to mechanical and thermal stress, and the change in resistivity is recorded to predict long-term electrical performance under service conditions.
Dielectric strength and breakdown voltage per ASTM D149 and IEC 60243-1 — for insulating or semi-conductive rubber grades, the voltage at which electrical failure occurs is measured to verify the insulation capability where required.

Electromagnetic Shielding Effectiveness Testing for Conductive Rubber

Shielding effectiveness per ASTM D4935 and IEEE 299 — the conductive rubber gasket or sheet is mounted in a coaxial holder or shielded enclosure, and the attenuation of electromagnetic waves is measured from 30 MHz to 18 GHz to verify the specified shielding performance for electronic enclosures and cables.
Transfer impedance and surface transfer impedance per IEC 62153 — for conductive rubber gaskets used on cable shields and connectors, the transfer impedance is measured to quantify the leakage of electromagnetic energy through the gasket interface.
Near-field and far-field shielding evaluation — the conductive rubber is tested with electric and magnetic field probes in both near-field and far-field regions to verify shielding effectiveness across the full range of interference conditions.
Shielding effectiveness after environmental aging and mechanical cycling — the gasket is aged under temperature, humidity, and compression cycles, and the shielding effectiveness is remeasured to ensure long-term electromagnetic compatibility performance.

Mechanical and Physical Property Testing for Conductive Rubber

Tensile strength and elongation at break per ISO 37 and ASTM D412 — dumbbell specimens are pulled to failure to measure the ultimate tensile strength and stretch, ensuring the conductive rubber withstands installation stress, compression, and flexing without tearing.
Tear strength per ISO 34-1 and ASTM D624 — the force required to propagate a cut in the conductive elastomer is measured to verify resistance to damage from sharp edges, fasteners, and mechanical handling.
Hardness by Shore A and Shore D durometers per ISO 48-4 and ASTM D2240 — the indentation hardness is measured to confirm the specified softness or stiffness for proper sealing, compression set, and contact pressure.
Compression set under constant deflection per ISO 815-1 and ASTM D395 — the conductive rubber is compressed at elevated temperature and the permanent deformation is measured to predict long-term sealing force retention and electrical contact stability.
Rebound resilience per ISO 4662 and ASTM D2632 — the elastic recovery after impact is measured to evaluate the dynamic performance of conductive rubber pads and gaskets.
Density and specific gravity per ISO 2781 and ASTM D792 — the mass per unit volume is determined to verify filler loading and batch consistency, which directly influence conductivity and mechanical properties.

Thermal and Environmental Durability Testing for Conductive Rubber

Thermal aging in air per ASTM D573 and ISO 188 — the conductive rubber is aged in a ventilated oven at elevated temperatures, and the retained conductivity, hardness, tensile strength, and elongation are measured to predict the maximum continuous service temperature and thermal endurance.
Thermal cycling and thermal shock per IEC 60068-2-14 — the conductive rubber is rapidly cycled between hot and cold extremes to verify the filler network and elastomer matrix withstand thermal expansion and contraction without loss of conductivity or mechanical integrity.
Damp heat and humidity exposure per IEC 60068-2-78 — the conductive rubber is stored at high temperature and high relative humidity, followed by electrical and mechanical retests to ensure no moisture-induced degradation of conductivity or sealing performance.
Low-temperature flexibility and cold impact resistance per ASTM D2137 — the conductive rubber is conditioned at sub-zero temperatures and flexed or impacted to verify it remains pliable and does not crack in cold climates.
Ozone resistance under static and dynamic strain per ISO 1431-1 — the conductive elastomer is exposed to elevated ozone concentrations while strained, and the surface is inspected for cracking to ensure long-term durability in atmospheric environments.
UV and xenon-arc accelerated weathering per ASTM G155 and ISO 4892-2 — the conductive rubber surface is exposed to simulated sunlight and moisture cycles to evaluate color change, surface degradation, and retention of electrical properties.

Chemical Resistance and Fluid Compatibility Testing for Conductive Rubber

Immersion resistance to oils, fuels, and hydraulic fluids per ASTM D471 and ISO 1817 — the conductive rubber is immersed in representative service fluids at defined temperatures, and the change in mass, volume, hardness, and resistivity is measured to verify compatibility with the intended environment.
Resistance to acids, alkalis, and cleaning agents per ASTM D543 and ISO 175 — the conductive elastomer is exposed to aggressive chemicals to verify no softening, swelling, or loss of conductivity occurs during cleaning and maintenance.
Water absorption and hydrolytic stability per ASTM D570 — the mass of water absorbed after immersion is measured to predict the effect of moisture on conductivity and mechanical properties.
Resistance to mold and fungal growth per ASTM G21 and ISO 846 — the conductive rubber is inoculated with fungal spores and incubated to confirm it does not support biological growth in humid environments.

Chemical Safety and Restricted Substance Compliance for Conductive Rubber

RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the conductive rubber, fillers, and any coatings.
REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern including specific phthalate plasticizers, organotin stabilizers, and restricted flame retardants.
Polycyclic aromatic hydrocarbons per AfPS GS 2019:01 PAK — for carbon-black-filled or dark-colored conductive rubber, the 15 restricted PAHs are extracted and quantified to confirm compliance with European product safety limits.
Heavy metals in packaging per EU Directive 94/62/EC — verification that the sum concentration of lead, cadmium, mercury, and hexavalent chromium in the protective packaging and labels is below the 100 ppm regulatory limit.
Volatile organic compound and formaldehyde emission per ISO 16000-3 — chamber testing verifies that the conductive rubber does not release harmful VOCs or formaldehyde into indoor air during storage or use.
Halogen content by combustion ion chromatography per EN 14582 — the total fluorine, chlorine, bromine, and iodine content is measured to support halogen-free declarations for environmentally conscious electronics manufacturing.

Report Recognition and ISO/IEC 17025 Compliance

Every test method described in this conductive rubber testing service is covered by our ISO/IEC 17025 scope of accreditation. Our technical reports and certificates of analysis are accepted by European notified bodies for electronic components and industrial products, by North American electronics OEMs and defense contractors referencing ASTM and IEEE standards, and by customs and procurement authorities across Japan, Korea, and the Gulf region. Whether you require a complete qualification dossier for a new conductive rubber formulation, a batch release inspection for an export shipment, or a root cause failure analysis of a conductivity or shielding issue, our laboratory provides the measurement accuracy and elastomer expertise that the global conductive rubber industry demands.