Conductive & Dielectric
Grease.
As drivetrains electrify, grease has to manage electricity, not just friction. We formulate conductive greases that bleed shaft currents and stop bearing fluting, and dielectric greases that insulate and seal connectors and HV joints — built to your resistivity target, with full IP transfer.
The grease has to
manage current.
In an electrified system the grease has a second job — controlling electricity — and that job runs in two opposite directions.
Conductive grease is engineered to a low electrical resistance so it gives shaft currents a path to ground, preventing the electrical fluting / EDM-type pitting that destroys VFD-driven and EV motor bearings, and ensures reliable contact at grounding points. Dielectric grease is engineered to a high resistance so it insulates, seals and protects connectors, terminals, spark-plug boots and high-voltage joints from arcing, moisture and corrosion. A standard grease reliably does neither, which is why these are formulated as distinct electrical products.
The targets an electrical
grease is judged on.
Public performance targets and reference ranges — not a recipe.
Resistivity is set by the
filler and the base.
Conductivity is engineered into an otherwise ordinary grease by a conductive phase — carbon black/graphite, fine metal particles or conducting polymers — dispersed in a suitable thickener and base oil, as set out in the published art on conductive greases for motors (US20050062350A1) and conducting-polymer-thickened greases (US5773394). Dielectric grades take the opposite path — an inert, non-polar base such as silicone or PFPE with a non-conductive thickener. For sealed-for-life motor bearings, a polyurea / diurea thickener gives high drop point and low noise (CN1408825A).
Composition follows standard grease structure: base oil + thickener ~8–15% + functional (conductive/insulating) phase (public reference). What the patents do not give is the exact base/thickener/filler system and loading that hit your resistivity and temperature target while still lubricating — and that is the work.
Validated on the
methods that matter.
Each candidate is checked on volume resistivity, drop point (D2265), penetration (D217), water washout (D1264), copper corrosion and elastomer compatibility — and benchmarked against your reference.
Your formula —
not a patent's.
We convert the public art into a manufacturable, cost-optimised, globally sourced electrical grease that hits your resistivity target — and hand it over as your asset.
Conductive & dielectric grease —
questions.
They do opposite electrical jobs. A conductive grease has low electrical resistance — it bleeds shaft currents to ground and prevents electrical fluting / EDM-type erosion in VFD-driven and EV motor bearings, and gives reliable contact at grounding points. A dielectric grease is an insulator — it seals and protects electrical connectors, terminals, spark-plug boots and HV joints from arcing, moisture and corrosion. Both still lubricate; the electrical behaviour is engineered in.
In inverter-fed (VFD) and EV traction motors, shaft voltages discharge through the thin oil film in the bearing, sparking and pitting the raceway in a washboard pattern (fluting). A conductive grease provides a controlled current path so the energy bleeds away instead of arcing through the contact. Conductive greases for motors are described in patents such as US20050062350A1.
It is related but broader. Our EV motor bearing grease page covers the sealed-for-life polyurea bearing grease itself; this page covers the electrical-function grease category — conductive (grounding, anti-fluting) and dielectric (insulating, sealing) — across EV drivetrains, industrial motors, connectors, switchgear and battery terminals.
Yes — under NDA, with full IP transfer. This page shows the public chemistry and patent landscape; the exact base/thickener/conductive-filler system and treat rates are developed to your resistivity and temperature target and handed over as your asset.
Need a conductive or dielectric grease?
Let's formulate it.
Tell us the application, the resistivity / temperature target and the volume — we'll scope the R&D and deliverables.