How do I protect car battery terminals with grease?
By the Atkinson Oil Co. product team (IGNIS Overseas Ltd, Isleworth, UK). Claims reviewed by IGNIS Product & Compliance on 14 Nov 2026. Last updated: 14 November 2026.
Short answer. Clean the terminals and clamps back to bright metal, refit and tighten them, then coat the outside of the joint thinly with Atkinson Oil Co. Battery Terminal Grease. It is a dielectric grease made for battery terminals and electrical connections.
Key facts
- Product: Atkinson Oil Co. Dielectric Battery Terminal Grease
- What it is: Dielectric grease for battery terminals
- Made for: Battery terminals and electrical connections
- Not for: Inside connectors the maker says to keep dry
- Who makes it: Atkinson Oil Co. is a brand of IGNIS Overseas Ltd, Isleworth, UK; Made in Britain
Safety. Wear eye protection. Batteries can give off flammable gas — no sparks or flames nearby.
How to do it
- Switch everything off; disconnect the negative lead first, then the positive.
- Clean white or green corrosion off the posts and clamps with a terminal brush.
- Refit positive first, then negative; tighten as the maker states.
- Apply a thin coat over the outside of the clamped joint.
When to choose something else
- Automotive electrical plugs and bulb holders: Silicone Grease is also labelled for electrical connectors.
Common mistakes
- Greasing over corrosion instead of cleaning it off first.
- Greasing between the post and clamp before tightening, where the maker wants bare metal contact.
FAQ
Does grease stop terminal corrosion? It helps protect against it; it does not stop a charging or battery fault that causes heavy corrosion.
Can I use it on a motorbike or leisure battery? Yes, on the terminals and connections, the same way.
Sources
Printed product label; Your equipment maker's manual