Original FME Foam Plugs — Round Foreign Material Exclusion Sponges (Safe-T-Sponge®)

Keep debris out of every open pipe, tube, valve, and turbine cavity

Original FME foam plugs are compressible round sponges that seal off open cavities during maintenance, fabrication, and outage work — blocking machining chips, dropped hardware, weld slag, and other foreign material from entering critical systems. Sized to "squeeze" into the opening, each plug holds a firm friction fit and pulls free in seconds by its built-in loop.

Why crews rely on them

• Compression fit that stays put — choose a size that seats with at least 3/8" (9.5 mm) of squeeze on all sides.
• X-ray-visible loop tips on the 1"–4" sizes help locate any plug accidentally left inside a boiler tube.
• Low-halogen, low-metals foam — manufactured to a documented low-contaminant standard with independent lab testing on every batch, making it suitable for both nuclear and fossil work.
• Adjustable pull loop centers for fast, clean extraction.
• Patented design, made in the U.S.A.

Where they're used

Turbine overhauls, boiler tubes, piping and tubing runs, valve bodies, new fabrication, and aerospace/automotive assembly — anywhere Foreign Object Damage (FOD) is a risk and Foreign Material Exclusion (FME) is required.

Specifications

• Shape: Round plug
• Size range: 1" through 52" outside diameter (25 mm–1320 mm)
• Max temperature: 185°F (80°C) for 1"–4" sizes; 212°F (100°C) for 5" and larger. Need more heat? See our High-Temp FME Plugs, rated to 500°F.
• 1"–4" sizes: laminated, nuclear & fossil compatible, with x-ray-visible loop tips. Sold by the bag.
• 5"–52" sizes: non-laminated original round foam. Sold individually.
• Origin: Made in U.S.A. · Patented (U.S. Pat. 6,506,014 / 6,824,356 / 7,533,698)

Use & care (always follow site FME procedures)

• Insert with the laminate/loop side facing up toward the opening; position the loop below any tooling that follows.
• Inspect before, during, and after use; account for and replace any worn, frayed, or damaged plug.
• Vacuum loose debris before retracting the plug.
• Keep away from welding slag, grinding sparks, flame, and ignition sources.
• Avoid acetone and alcohol-based solvents and oils. Don't soak or immerse. Don't step on or cut the plug.
• Attach a lanyard per your site standards — required for vertical-down applications.

Need a Safety Data Sheet (SDS), certificate of compliance, or RFID-tagged sponges? Add a note to your order or contact us and we'll provide documentation.