Forespar Emergency Plugs
Forespar Sta-Plug: Redefining the Marine Emergency Plug
When a hull breach occurs on the water, seconds matter. Forespar — a California-based marine innovator with roots stretching back to 1966 — has applied the same engineering mindset behind its renowned Marelon® plumbing systems and carbon-fiber poles to one of boating's most critical safety tools: the emergency plug. The result is the Sta-Plug®, a purpose-engineered solution that leaves traditional wooden bung plugs firmly in the past.
Why the Sta-Plug® Stands Apart
Conventional straight-edged wooden plugs assume a perfectly round, cleanly cut hole — exactly the kind of breach you are unlikely to encounter during a real emergency. Forespar's Sta-Plug® was designed around the chaos of real-world hull failures. Its soft, tapered cone shape allows it to conform to the irregular geometries of impact-caused breaches as well as the round openings left by a failed hose or through-hull fitting.
The defining innovation is Forespar's patented edge-gripping riblet system. A series of concentrically larger riblets are stepped along the length of the cone, giving the plug two critical advantages over traditional designs: the riblets help the plug conform tightly to the hole near the edge — where a secure fit is most crucial — and they grip the surrounding material to hold the plug more firmly in place under water pressure. It's this feature that earned the Sta-Plug® its tagline: The Emergency Plug that Grips™.
Materials Built for Marine Readiness
The Sta-Plug® is constructed from high-strength elastomer composites (rubber-like materials) that remain soft, pliable, and ready to deploy for years. Unlike wood, these materials will not swell, warp, or grow mold sitting in a bilge or safety kit — meaning the plug is truly ready when you need it. The bright orange color ensures the Sta-Plug® can be located instantly in the frantic moments of an emergency, even in a cluttered locker or dark bilge.
Sta-Plug® Mini: Compact, USCG-Friendly Preparedness
Forespar also offers the Sta-Plug® Mini, which delivers all the same form-fitting, riblet-grip performance in a smaller package sized for smaller through-hull openings and hose connections. It comes with a lanyard hole for easy tethering to your safety gear, and it meets US Sailing Special Equipment Requirements — making it a smart inclusion in any offshore or racing safety kit. The Mini is available in a convenient two-pack so you can stage plugs at multiple points on the boat.
Proper Use and Placement
The Sta-Plug® is designed for temporary emergency use with continuous monitoring, giving the skipper the time and peace of mind needed to focus on getting the vessel to safety. It can be pushed into a leaking hole by hand or with a tool, and tearing at a specific riblet allows the user to size the plug for the hole at hand. Forespar recommends storing the Sta-Plug® in an immediately accessible location alongside other critical safety gear — not buried at the bottom of a storage compartment.
For boaters who trust Forespar's Marelon® through-hulls, seacocks, and safety hardware to keep water where it belongs, the Sta-Plug® is a natural complement — the last line of defense when everything else has failed. Explore the full range of marine emergency plugs or visit the Forespar brand page to discover their complete safety and marine plumbing lineup.