Reliable Sealing for Automotive & Industrial Use

Our range of copper sealing washers are perfect for applications requiring a tight, crushable seal — particularly in high-pressure fuel, brake, oil, and hydraulic systems.

Commonly used in:

• Oil drain plugs & sumps
• Injector sealing kits
• Brake and clutch systems
• Hydraulic fittings & banjo bolts

All washers are annealed copper unless otherwise stated — ensuring proper crushability and conformity for leak-proof performance.

📐 Sizes & Standards

We stock a wide selection of:

• Metric copper washers (e.g. M6, M8, M10, M12, etc.)

Check product titles and descriptions for inner diameter (ID), outer diameter (OD), and thickness.

⚙️ Why Use Copper Washers?

• Excellent thermal conductivity – ideal for hot fluids
• Corrosion resistance – perfect for automotive and marine
• Soft sealing – conforms under pressure for tight, reusable seals
• Used in injector return lines, turbochargers, gearboxes, radiators, and brake systems

✅ Why Buy from SealWithSelo?

• No minimum quantities – buy 1 or 1000
• All washers clearly measured and bagged
• Fast UK dispatch with fair shipping
• Trade & bulk pricing available – just ask