Sealing Washers vs. Non-Sealing Washers: What’s the Difference?

Washers may seem like simple hardware, but they serve a critical function in keeping fasteners secure. While all washers help distribute force and protect surfaces, some go a step further by providing a reliable seal against dust, moisture, and other contaminants.

So, what’s the difference? Sealing washers protect against environmental intrusion, while non-sealing washers serve only mechanical purposes. Choosing the right type can impact everything from long-term equipment performance to safety and maintenance costs. Here, we’ll break down how sealing and non-sealing washers differ—and when to use each.

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