Electroinsulating Compounds
A rubber compound based on special SBR / NR, formulated for very high volume electrical resistivity. It is intended for technical components where the flow of electric current must be blocked — from railway equipment to industrial electrical installations.
Technical Specifications
Indicative values, typical for SBR/NR electroinsulating compounds. Exact parameters are confirmed on the recipe approved in Geola Prod's in-house laboratory.
| Parameter | Value |
| Elastomer base | Special SBR / NR |
| Shore A hardness | 50–75 |
| Working temperature | -30°C … +100°C |
| Tensile strength | ≥ 9 MPa |
| Elongation at break | ≥ 200% |
| Density (indicative) | 1.35–1.55 g/cm³ |
| Volume electrical resistivity | > 10¹² Ω·cm |
| Ozone resistance | Moderate |
| Reference standards | SR ISO 37, ISO 48-4, IEC 60093, SR ISO 188 |
Applications
Railway
Electroinsulating components for rolling stock cabins and panels, where protection against accidental contact with live parts is required.
Electrical Power
Insulating elements for low- and medium-voltage panels and equipment in industrial installations.
Industrial Equipment
Technical parts requiring reliable electrical insulation combined with moderate mechanical strength.
Frequently Asked Questions
What is an electroinsulating rubber compound and how does it differ from standard rubber?
It is a compound formulated with base polymers (SBR or special NR) and fillers selected so that volume electrical resistivity stays very high, typically above 10¹² Ω·cm, blocking the flow of current. Standard rubber does not have this parameter guaranteed and controlled through the recipe.
What electrical resistivity do Geola Prod's electroinsulating compounds guarantee?
Typical values exceed 10¹² Ω·cm, verified in our in-house laboratory for every batch. The exact parameter is established together with the client, depending on the application and the approved recipe.
What railway applications use these compounds?
For electroinsulating components intended for cabins, panels and equipment where accidental contact with live parts must be prevented. Geola Prod SRL holds company-level AFER approval; the compliance of each final part with the railway project requirements is established together with the rolling stock manufacturer.
Can you formulate an electroinsulating compound with parameters specific to my request?
Yes. We start from the required hardness, thermal range and electrical resistivity and develop the recipe in our in-house laboratory, with an analysis report for every batch delivered.
Other Rubber Compounds
Request a Quote for Electroinsulating Compound
Specify the application, resistivity and hardness required — we will formulate the optimum recipe for you.