Scanstrut DS30-P-3 Vertical Cable Seal *5-Pack

The Scanstrut DS30-P-3 Vertical Cable Seal *5-Pack is an essential marine component for anyone who runs through-hull cable penetrations on their vessel. After years on the water, I've learned that water intrusion around cable passages is one of the most common sources of cabin leaks and electrical gremlins. These vertical cable seals solve that problem by creating a watertight barrier where cables pass through bulkheads, deck plates, or hull transducers—whether you're running GPS, sounder, radar, or autopilot wiring. The five-pack quantity ensures you have spares on hand and covers multiple cable runs across your boat without additional orders.

Scanstrut engineered these DS30-P-3 seals with a design that accommodates cables up to 30 mm in diameter, using durable marine-grade materials that resist UV degradation, saltwater corrosion, and temperature cycling. Each seal features a vertical orientation, meaning the cable entry point faces downward or sideways—critical for preventing water from pooling or running directly into the penetration. The compression mechanism creates a positive seal around the cable without requiring adhesives or sealants, making installation straightforward even in tight engine compartments or below-deck spaces. The rigid construction maintains integrity under the vibration and flexing that occur during heavy seas or high-speed running.

Professional boat builders and experienced cruisers trust Scanstrut cable seals for both new builds and retrofit installations. They work equally well on sailboats, center consoles, sport fishers, and trawlers. The DS30-P-3 fits standard 30 mm cable glands and is compatible with most marine electronics manufacturers—Garmin, Lowrance, Furuno, and aftermarket systems alike. Installation takes minutes with basic hand tools; simply thread the cable through, position the seal vertically at the penetration point, and hand-tighten the compression nut. Keep a spare or two in your spares locker; they're too inexpensive and too valuable to be caught without one when a cable seal fails at sea.