I figured this out years ago when finishing Suilven II, a Wharram Tiki 26 catamaran. We needed a good watertight seal on the forward lockers. These were exposed to the occasional dollop of fast moving “green water” so the seal needed to be good.
Commercially manufactured seals weren’t readily available so I decided to improvise using silicon sealant, molded to the gap between the hatch and the deck coaming. The result was a perfect seal. It was so good that a fall in temperature would lower the pressure in the locker and make the hatch hard to open!
When I finished my Storm LT kayak three years ago I decided to use the same technique to form the fore and aft hatch seals, rather than use a soft rubber seal. It has worked very well, keeping water out during practice wet-exits.
The hatch has been positioned, and the silicon pushed out. Allow a day or two to fully cure.
Here’s how to do it.
Clean up and degrease the flange where the hatch will sit. It’s important that the silicon sealant bonds well to this surface.
- Tape of the exterior surfaces where you don’t want extruding silicon to stick.
- Liberally coat the underside and edge of the hatch with a release agent. I used Pathway Polymers “Synlube 531 Release Agent” simply because I already had a can. Whatever release agent you use, I strongly recommend a trial with the silicon rubber you intend to use (GE Tub & Tile 100% silicon in my case). A stick up could be very tricky to undo!
- Squirt a generous bead of silicon onto the flange.
- Carefully place the hatch into the exact position. Push it down to extrude the sealant. You may want to improvise some spacers for exact positioning. It has to right first time!
- Allow the silicon to fully cure then pry off the hatch.
- Trim the surplus silicon with a sharp utility knife.
You now have a durable silicon rubber seal that exactly matches the shape of the hatch. The fit will be so good that you may need a handle or pull cord to remove it.
Nylon straps that can be tensioned hold the hatches in place.
During a recent visit to the Fowey, Cornwall – the south western peninsular of the UK – I came across this gorgeous cutter. Unfortunately I don’t have any details (no name visible from the dock) and no one was available for comment. Maybe someone out there knows more..? It took my breath away!
Seen in Fowey, UK, May 2015
Also seen entering the harbour – a restored working boat no doubt.
By David Skelhon
Thirty years ago I quit my job in science and engineering. Even in my late 20’s I was tired and disgruntled with the world and my place in it. I wanted to get off the treadmill, and experience the beauty of Planet Earth, or at least my little corner of it.
With my partner at that time, Jill Brown, we looked to the world of sailing for travel and adventure. We sold our home, built a small Polynesian-style catamaran and moved to the ocean. We struggled to make a living in Cornwall, one of the most beautiful counties in the British Isles. I built boats and wrote books and magazine articles. It took a few years but the dream eventually became reality and culminated in an extraordinary voyage around the west coast of Britain in the summer of 1990.
Suilven’s Travels: A Life Changing Celtic Odyssey is my account of this 3 month cruise which was packed with adventure and challenge. Suilven II departed Plymouth in July and headed to the Hebrides, stopping in Scilly, Wales, the Isle of Man and Northern Ireland. The story brings to life the landscape and culture of western Britain and in particular Scotland’s Inner Hebrides. It also shows what is possible on a minimal budget if the desire to succeed is strong enough. I was alone for most of the outbound trip, giving me plenty of time to reflect on the world and my place in it. Jill Brown was with me on the demanding return trip when we struggled against gales and rough seas and came close to losing our small boat on a couple of occasions.
Looking back nearly 25 years it’s obvious there has been dramatic change in our world – especially in technology. But the human spirit and the search for meaning in life is growing stronger as more of us realize it is becoming impossible to thrive in a system which essentially alienates us from our Earth, and our true selves. Suilven’s Travels was written to inspire others to step outside the box and live closer to the Earth. It is available for $3.99 as an eBook on Amazon, in multiple formats on Smashwords and will be available at many other outlets soon.