Rubber Hole Plugs & Stoppers – Plugs for Holes in Pipes, Tubes, Tanks & Panels

Shop rubber hole plugs and stoppers — solid rubber plug stoppers that seal holes, pipe ends, and openings by simple push-fit compression. Two styles are stocked: solid tapered line-seal plugs (stem diameters 11/32" to 19/32") that press into pipes, drains, and drilled holes for pressure testing, winterizing, and capping lines, and flanged button-style push-in plugs (fitting 1/8" to 1/2" panel holes) whose flat, oval, or domed heads finish the hole flush while doubling as bumper feet.

How to size a rubber plug: measure the hole or pipe inside diameter — a compression plug should be at or slightly above that size so the rubber squeezes in and grips. Full walkthrough in the rubber plug size guide.

Common uses: plumbing pipe stoppers, sealing drilled holes in tanks, sinks, and panels, masking holes for paint and powder coat, capping unused mounting holes in equipment, and silencing rattles in tube ends. Need a lined pass-through for wires instead of a seal? Use a rubber grommet. Closing a large panel hole? See blank/closed grommets up to 3"+. Maintenance teams and plumbers: bulk pricing available.