RANDDER Universal Kayak Scupper Plug Kit Silicone Scupper Plugs Canoe Drain Hole Stopper Bung with Lanyard, Fits 3/4 to 1.5 inch Holes, 4 Pack Review (2026)

What this kit is for

Sit-on-top kayaks drain through scupper holes in the hull, which is great for shedding waves but means a little water can also push back up through those same holes in choppy conditions or when you are loaded down near your weight limit. The RANDDER kit gives you four silicone plugs sized to fit the 3/4 inch to 1.5 inch scupper holes common on recreational and fishing sit-on-tops. Pushing a plug into each scupper you want sealed keeps that hole dry while you paddle, and pulling it back out restores normal drainage once you are back on flat water or loading gear that tends to get wet. It is a small, inexpensive accessory rather than a structural part of the kayak, and most paddlers keep a set in a dry bag or tackle box rather than leaving them installed permanently, since a fully plugged hull loses the self-draining feature that makes sit-on-top kayaks forgiving in surf and wakes.

Materials and sizing

Each plug is molded from silicone, a flexible material that compresses slightly as you push it into a scupper hole, which is what lets one plug size work across a range of hole diameters rather than needing an exact match. RANDDER lists the fit range as 3/4 inch to 1.5 inch, which covers the majority of scupper holes found on popular sit-on-top kayaks from brands like Lifetime, Pelican and Perception. Every plug in the four pack has a short lanyard attached, so if a plug works loose while you are paddling through waves or surf it stays tethered to the boat instead of sinking or drifting away. The plugs are small and light, so they are easy to store in a day hatch or PFD pocket as spares, and because they are not brand-specific you do not need to match them to your exact kayak model, only to the hole size.

Installing and living with the plugs

Fitting a scupper plug is a hand job, no tools required: you line up the plug with the hole and push until the silicone seats snugly against the sides. Because the fit relies on the silicone compressing rather than threading or locking in, a plug pushed in at an angle or only partway can pop free under wave action, which is the most common complaint with universal plug kits like this one. Seating each plug straight and firmly, and giving it a light tug to check the lanyard is secure, solves most of that. Most owners only plug the scuppers nearest their seat or feet to stay dry on calm water, leaving the rest open for normal drainage, which also means a four pack is often enough even though many hulls have six or more holes total. Rinsing the plugs with fresh water after saltwater trips keeps the silicone from stiffening over time.

Trade-offs and how it compares

The main limitation of a four pack is coverage. Fishing kayaks in particular can have six, eight or more scupper holes once you count rod holder mounts and hatch drains, and rival kits such as the EDSRDPLT 8 Pcs Kayak Scupper Plugs Kit or the Axlksia 8 Pcs kit include twice as many plugs for boats with that many holes. If your kayak only has four to six scuppers near the cockpit, the RANDDER set is simpler and cheaper than buying an 8-piece kit you will not fully use. The lanyard design is shared across most of these universal kits, so the real decision point is plug count versus hole count on your specific boat, not a meaningful difference in materials or fit range between brands.

Who should buy it

This kit suits owners of smaller sit-on-top kayaks or anyone who only wants to seal the scuppers closest to their seat to stay drier on a calm day, rather than plugging an entire hull. It is also a sensible spare to carry even if you already own plugs, since silicone plugs do get lost overboard occasionally. Paddlers with fishing kayaks that have many scupper holes, or anyone who wants to fully seal a hull for cold-weather paddling, should count their scuppers first and consider an 8-piece kit instead so they are not left with open, unplugged holes. Given our score of 8.6 out of 10, this is a solid, low-risk accessory as long as the pack size matches your boat.

Frequently asked questions