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Stellar Intrepid 18' Sea Kayak (SI18)

Length: 17' 11"/ 5.5 m — Beam: 21.3'/ 54 cm

  • Speed

  • Stability

£2,244.00 (inc. VAT) Regular price £2,820.00
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The Stellar Intrepid 18' (SI18) Sea Kayak, a very capable and more traditional hull design.

Hard chines, a defined keel and a retractable skeg provide excellent handling in the Rock-Gardens or longer adventures. With 3 sealed storage compartments, a small day hatch in front of the cockpit and deck rigging, the SI18 provides plenty of storage options and accessibility. A molded seat pad and thigh brace provide comfort and stability when it gets rough.

Colour Options

Our boats are available in a wide range of colour options. To learn more about customising your boat visit our boat customisation page here.

Lead Time & Delivery

Lead time can vary depending on the model and colour chosen. Please enquire for lead times. You can also see our current inventory here.


Length: 17' 11"/ 5.5 m

Beam: 21.3'/ 54 cm

Depth: 13.4" / 34 cm

Paddler: 5' - 6' 6" / 1.5m-2m

Capacity: 320 lbs / 145kg

Cockpit W: 17.3"

Cockpit L: 31.9"

Bow Storage: 15.2 Gal

Stern Storage: 33.3 Gal


Kayak Rudder

Toggle Handle

Bottle Holder Seat Pad

Kayak Bow Hatch

Cut Away

SmartTrack Footbrace


Bow & Stern Handles

Toggle handles with Bungie line for easy handling in the surf and on land.


Adjustable padded seat, with a water bottle holder. Smaller width, oval cockpit for easy entry, with padded thigh braces and heel pad.


High volume deck for larger paddlers. Cut-aways on bow deck for narrow catch and an efficient stroke. Static perimeter line and Bungee X lines for deck rigging.

Storage Compartments

Large oval and medium round stern hatches, medium oval bow hatch for three water tight storage compartments, plus a small water tight bow deck pod for a smaller item.

Foot Brace

Smart Track Transitional foot brace is easy to adjust in the boat, with responsive steering.

Kajak-Sport Skeg

Efficient powerful foil shaped skeg can be deployed at various depths for greater boat control.

Hull Design

Hard chines, shallow-V hull, with medium rocker make for a boat that can handle it all. Low drag design makes for fast paddline too.


Double fiberglass taped seams lines, inside and out, for incredibly strong and durable hull and deck joint. Reinforced fittings and keep line for rough water use.

Construction Options


Alpha - Woven

Extremely stiff and light - The ultimate paddling machine that is also easy to move off of the water.

Clear finished, heat cured epoxy woven Toray 3k Carbon Fiber laminate with Nomex® Honeycomb Core. 

USES: Racing, fitness or easy to handle on land. Requires care in transport and protect against hitting rocks



Very stiff and light, yet more affordable than the Alpha. Kevlar® adds impact strength to the laminate - Gelcoat finished heat cured epoxy Kevlar® and Fiberglass laminate with Nomex® Honeycomb Core. Great for racing, or those looking for a light boat, but not as impact resistant as the Multi-sport or Advantage constructions.

USES: Racing, fitness or easy to handle on land. Requires care in transport and protect against hitting rocks.



Single skin laminate hull made of Carbon & Kevlar® fabric, with clear gelcoat finish, and the deck is the standard Advantage construction. The hull is designed to be flexible and durable, but creates a stiff boat that can take some abuse in the class I and II rapids and shallows, but is also at home in the ocean or the flats. The Surf Ski Multi-Sport construction comes standard with an over-stern rudder.

USES: Racing fitness or touring. Flexible hull is ideal for shallow water paddling or small rivers.



Great combination of weight, stiffness, durability and cost. Gelcoat finished heat cured infused epoxy Fiberglass and Soric® core laminate is very tough and resists against punctures. A great race boat on a tight budget. The Advantage hits the mark for price to weight ratio for most kayak paddlers. 

USES: Racing, fitness or touring. Stiff yet flexible hull is very tough and but take care in shallow rivers and lakes.

The Stellar Difference

The difference is in the details. At Stellar, we realise that all materials are not made the same and premium materials help make a superior boat. From Dupont Kevlar, Toray Carbon, Lantor Core and 3M finishing materials, we realize that these materials may cost more, but provide you with a superior boat in mechanical strength, aesthetic finish, optimal weight and consistent performance. We process those superior materials, by using epoxy resin, heat curing, vacuum and infusion to create the some of the best boats on the market.

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