The Best Way to Install Sealing Washers for a Leak-Free Fit

Installing sealing washers isn’t just about placing them in position—it’s about precision and care. If you want a perfect seal every time, follow a few key steps that professionals swear by.

First, clean the surfaces where the sealing washer will sit. Even a thin layer of dust or oil can create a gap, ruining the seal. Use a lint-free cloth and degreaser for best results.

Next, align the sealing washer properly between the two surfaces. Hand-tighten the bolt or nut until the washer is snug and secure. Then use a torque wrench to apply consistent pressure—enough to compress the washer, but not so much that it deforms or cracks.

In plumbing jobs, applying a bit of plumber’s grease to rubber sealing washers can extend their life and improve the seal. For machinery or automotive use, avoid using lubricants unless specified.

And remember—sealing washers are usually designed for one-time use. Even if it looks okay, replacing it during disassembly ensures a fresh, tight seal every time.

Install your sealing washers right, and you’ll avoid leaks, reduce wear, and save time on future repairs.