A square gasket has four equal sides, cut to your exact size for square covers, boxes, and ducts. We laser-cut custom square gaskets in any material with clean, consistent edges, no minimum order, shipped within 24 hours.
Dimensions You Enter for a Square Gasket
| Side length | Length of each equal side |
| Thickness | 1/16", 1/8", 3/16", or 1/4" |
| Corners | Square or rounded |
| Material | Any elastomer or fiber |
Available in every material we stock — neoprene, silicone, EPDM, Buna-N, Viton, PTFE, cork, and fiber. Additional specs on request.
Common Square Gasket Applications
- Square access covers and lids
- Electrical box and panel seals
- Square duct flanges
- Equipment and instrument enclosures
- Skylight and vent covers
Square Gasket FAQs
What size square gaskets can you cut?
Enter the side length in the quote tool and we cut a square gasket to that exact size, with square or rounded corners, in your chosen material and thickness.
Do you cut square gaskets with rounded corners?
Yes — a rounded-corner square version is available in the configurator for enclosures that use radiused corners.
Enter your dimensions in the quote tool above for an instant price on custom square gaskets from Fastest Gaskets — no minimum order, ships in 24 hours.
