Gumotex Seawave main page


Selected Seawave Index

sw02Kayaking Hayling Island
Paddling to Brighton

Seawave – fit a cheap rudder
2016 Seawave with rudder option
The Secrets of Priest Island
Seawave in Venice
Seawave – fitting extra PRVs
Seawaving not Drowning
Seawave modifications

Seawave vs Amigo
Seawave vx Gumotex 410C
Seawave vs Incept K40
Windy first run
Seawave preview 2013

The Seawave is my current IK. It replaced a Grabner Amigo an Incept K40 and a Java before that. And before those boats for years I ran a Gumotex Sunny.

That run out to Bottle Island in the Amigo in 2014 was harder than it should have been, considering the flat calm conditions. And perhaps because I do more sea than river these days, I think I flipped too far from the speedy Incept to the solid Amigo. Since I bought the Amigo Gumotex’s Seawave came on the scene, an IK like the Incept but better and hopefully as fast.

og-safallingWhat finally clinched it was a great price from boatpark in Prague of around £570 with free EU delivery (Boatpark’s prices where always miles better, but this loophole may now be closed or made more complicated). A deck, pump, skirt and other bits added another £200. Coincidentally, it was ten years ago that I bought my very first IK from boatpark, a used and very tippy Safari (right) for about £120.
The other factor was learning that the 0.25 pressure rating for the Seawave can be pushed up to an Amigo-like 0.3 bar (4.35psi) or maybe even 0.33 (4.8psi). This is only in the side tubes: the Gumotex PRV in the floor means it purges at 0.25 to spare the I-beams coming apart. seawavecatOnce I got my boat the stats that I measured closely matched those from the 2015 Gumotex catalog (right):

  • Boat out of the bag: 16.9kg
  • Boat with OE seats and footrests removed: 15kg
  • Deck, coaming tube and 4 alloy deck supports (used once; sold): 2.3kg
  • Boat as I usually use it with DIY footrest tube, packraft seatbase, SoT backrest, packraft thigh straps and 3-m lanyard: 16kg 
  • Add my home made rudder and it’s 17.5kg

sw07The other dimensions are in the updated table above left: a tad lighter, shorter and  narrower. So even though the Seawave is long and I am heavy, it ought to be fairly responsive when run over-pressure. The 0.75-metre shorter Amigo was stiff as a brick, so the longer Seawave ought to match the Incept’s speeds, which is the plan.
And although it’s not as shapely as the Incept, the Seawave’s bow is more of a cheese cutter than the Amigo’s upturned flat floor (left). And flipped over the Seawave’s ‘keel tube‘ (below left) is a little more pronounced. I wonder if this could mean better tracking without a skeg? (Yes it does.)
 sw10On the shallow Spey one time the unskegged Amigo was a right pain in the days of backwind we experienced – the back kept coming round requiring a whole lot of hauling effort to keep the boat in line and a lot worse than I recall with the Sunny run without a skeg. aladA rudder might have fixed that but those upturned bow and sterns are more wind catchers rather than the wave-riding water ploughs they’re supposed to be. On the Spey I did plenty of bailing in the Amigo following the WW2 rapids.

sw12Out of the bag, without any hesitation I removed the two inflatable seats and footrests and sold them with the Amigo. Instead I’ll re-use the very comfy set up I adapted on the Amigo: a packraft seat base (very light) and an SoT backrest (left). Luckily the Seawave has loads of attachment points to achieve that.fpy165
The thigh straps which I’ve become so used to on the Amigo clipped right into some handy D-rings and are a great benefit for efficient paddling and connection with the boat. I ditched the heavy SoT straps and instead use lightweight packraft straps.
sw-cantilasticI also added an adjustable footrest tube using a bit of plastic drainpipe and floor attachment points – an idea I got from an old Solar. For good drive in an IK you need solid lower back support and something for the feet to push on. Thigh straps triangulate the body to make you feel connected to the boat and not perched on a lilo.
Talking of the Solar, what they now call regular Nitrilon and on the Seawave is a lot different from that found on the 2006 Solar. That old boat’s fabric resembles the heavy-duty hypalon-like EDPM of the Amigo; a tough material that does feel a little OTT for a humble IK. sw03The Seawave’s supple Nitrilon feels more like a thicker version of Alpacka’s ‘TPU’ fabric: glossy, flexible, ‘sticky’ to the touch, probably great to glue cleanly and easy to fold. I know it was shrinked down in the factory, but look left how flat the Seawave was unrolled out of the box. It rolls up very compactly for a 4.5-metre IK, probably the same size as the Amigo. And it all fits in the 100-litre backpack dry bag supplied with room to spare for the deck, alloy struts, footrest tube and even the stirrup pump.
sw13I was shining up the Amigo’s hull with Hypatec (right) prior to selling it. Who knows if it’s any different from Aerospace 303 Protectorant – doesn’t look like it and costs about the same – but it sure makes the Grabner Amigo hard to grab once it’s on. So I lavished some onto the new Seawave, but I can’t say it took to the glossy fabric. Perhaps like Alpackas it already has its own embedded coating.
sw15sw14Other stuff: valves are a push-push type – no push and twist required and with nice seal caps too. That’s handy when you roll it up and want to get the last bits of air out quickly. The drain spout on the back (right) has already proved handy when out overnight in the rain. The deck lines seems to be a mandatory sea kayak requirement for France. I rarely find them useful, but I suppose it’s about having something to grab when you’ve fallen out. The rubber handles each end are especially comfy compared to the Amigo’s string in a tube.
sw19I thought I was going to enjoy using that removable lightweight deck but in the end only used it once when first out in the boat and sold it 18 months later when it was clear I was never going to use it again. Nice to have the option but the fact is, part of the canoe-like appeal of IKs is running an open boat, and if it’s about keeping dry and warm, I’d sooner wear a drysuit. The truth is, as sea at least, IKs can’t handle conditions where a deck would be needed to stop the boat swamping, and realistically the Seawave is too long for gnarly, white-water river running.


seawavebadenSumming up, the whole standard of finish of my Seawave is as good as the Grabner if not better. Not one drop of stray glue or sign of poor alignment. And you get a whole lot more with a Gumotex for less money, like seats and a skeg and numerous attachment points – and even a bag. Even the name Seawave isn’t in the usual goofy Sunny/Amigo happy-clappy vein. Gumotex are really on a roll these last few years.
Since I bought the boat, I added pressure relief valves to the two side chambers to match the one in the floor and added a strake under the bow and lately, added a rudder. having owned several IKs over the years the Seawave comes the closest to fulfilling my needs: great fabric and quality construction; high hull pressure; well outfitted out of the bag; great price; unembarassing name and plenty of room for touring or tandem paddling.