Rubber washers do a quiet but critical job in electrical work: they insulate, seal out moisture and cushion components against vibration. Choosing the right one protects both the connection and the operator.
Why rubber for electrical?
- Insulation: rubber is a natural dielectric, preventing unwanted contact
- Sealing: keeps moisture and dust out of enclosures and terminals
- Cushioning: protects boards and standoffs from vibration
Best materials
Silicone is excellent for electrical thanks to its heat tolerance and stable dielectric properties — see our silicone guide. Neoprene and EPDM are solid, economical choices for sealing enclosures against weather.
Common uses
Panel-mount switches and connectors, battery terminals, junction boxes, standoffs, lighting fixtures and outdoor electrical enclosures.
Match your dimensions in the size guide and shop by size here. Note: for safety-critical electrical work, confirm material ratings for your voltage and environment.