Manufacturer of SATURN Inflatables Since 1999

18' Inflatable Boats SD518

Short description:
MSRP: $3,798.00  
Available for preorder

The 18' SD518 is a largest inflatable boat in SATURN fleet.

New Model V3.0 - German Heytex PVC, Heat Welded Seams, Fiberglass Covered Transom, Premium Quality.

Introducing the unbeatable 18' SD518, the crown jewel of the SATURN fleet! Get ready to elevate your water adventures with our brand-new Model V3.0, featuring top-of-the-line German Heytex PVC, Heat Welded Seams, and a Fiberglass Covered Transom for unparalleled quality and durability.

Saturn Inflatable Boat SD518

Why settle for less when you can go big with the SD518? As the largest inflatable boat in our lineup, it's designed to impress and exceed your expectations. Whether you're in the market for a commercial workhorse, a fishing and diving companion, or simply a pleasure cruiser for unforgettable outings with friends, the SD518 delivers on all fronts.

Crafted from heavy-duty PVC fabric, this vessel can comfortably accommodate up to 10 passengers, ensuring there's always room for everyone to join in on the fun. And when the adventure's over, simply deflate the SD518 and fold it away for easy storage in your SUV, minivan, apartment closet, or garage. With optional dinghy wheels available, transporting your boat has never been more convenient.

Safety is our priority, which is why the SD518 comes equipped with double layers of fabric, a rub-strake protector, and a safety valve to prevent overinflation, ensuring you can navigate with confidence in any environment.

But that's not all – our inflatable masterpiece is packed with features to enhance your experience on the water. From the all-around rope grab line to the reliable flat air valves and stainless steel D-rings for easy towing, every detail is designed with your comfort and convenience in mind.

Plus, with additional equipment including a repair kit, three seat benches, and carry bags, you'll have everything you need to hit the water running. And to top it off, we're throwing in a complimentary high-volume hand pump to get you started right away.

Don't miss out on the ultimate inflatable boating experience. Upgrade to the SATURN SD518 today and make waves wherever you go! Click here to explore our range of optional accessories and customize your adventure.

18' SD518 inflatable motor boats come equipped with with a sectional heavy-duty aluminum floor. The bow section is made of a marine grade plywood floor covered with a gray resin. Aluminum floor installation steps are here.


  • All around rope grab line.
  • Separate internal air chambers.
  • 3 one-way drain valves with plug.
  • All around, durable rubber strike.
  • Safety valve to prevent over inflation.
  • Stainless steel D-rings for easy towing.
  • Reliable flat air valves with pushpin design.
  • Front bow D-ring with integral lifting handle.
  • Spare rope for attaching anchor is included.
  • Double layer of fabric at the bottom of tubes.
  • Holds up to 10 persons maximum or 6 comfortably.
  • Deep inflatable V-keel with a rub strake protector.
  • Heavy-duty marine grade aluminum floor is included.
  • Extra thick heavy-duty fiberglass reinforced plywood transom.
  • Lightweight and strong removable aluminum seat benches.
  • Equipment: repair kit, 3 seat benches and carry bags.
  • Free, complimentary generic high-volume hand pump is included.
  • For the list of optional available Accessories please click here.

You can download Saturn SD518 inflatable boat data sheet in PDF format

Video of SATURN SD518 with 25HP Motor.

Customer's Video Fishing From Saturn SD518.

Quick Tip! Worried about the heavy weight of a hard floored boat? Don't break your back! Get a foldable hand cart from any retail store to carry the folded boat around. Even inexpensive dolly movers will work great for transporting a folded or fully inflated boat. Get dinghy dolly wheels to easily move the inflated boat across the shore and into the water.

Saturn Inflatable Boats Specifications:

Overall Length:
Inside Length:
Overall Width:
Inside Width:
Tube Diameter:
Person Capacity:
Loading Capacity:
2500 lbs
Max Motor Power:
50 HP (15" shaft / 175 lbs)
Tube Shipping Size:
Tube Weight:
140 lbs
Floor Weight:
121 lbs
Tube Shipping Weight:
149 lbs
Floor Type:
Anodized Aluminum
Floor Shipping Size:
1100 Denier Reinforced PVC
Floor Shipping Weight:
128 lbs
Quadruple Overlap
Air Valves:
Recessed One-Way
Speed (approx.):
30 mph (40HP w/2 adults)
Inflation & Assembly:
45 min.

Note: Specifications and accessories are subject to change without notice. Max O/B Motor means: maximum power of outboard motor that can be safely used to plane the boat loaded to the maximum capacity at normal water surface conditions. Please exercise common sense and caution when using maximum motor capacity. Do not jump from wave to wave as new 4-stroke motors are much heavier then 2-stroke and provide extra strain on the transom. Under normal circumstances, with half the maximum persons/load capacity, 50% of maximum O/B power rating may be necessary to put boat on plane.

Awesome. Configurable fun

The SD518 is the biggest inflatable boat I have ever owned, it's massive. The floor is quite big and heavy as well so we had to put it on a permanent trailer, while we can deflate it and roll it up it's quite a bit of work. Other than that I am massively happy with it, it's spacious and it handles really well. I plan on putting a canopy like I have seen on the pictures. So far with a 25hp it moves really well although I would love to try something even stronger. I can recommend this or any of the other models in boatstogo store.

Love the boat but the manufacturer's statement of origin is not completely filled out by the manufacturer so I don't know what to do

I bought this boat to replace a different 14 foot infatable that had seen it's day. I got his with the center console and it is perfect for use in my boat lift repair and maintenance business. It's rugged, stable and runs great with my 1980 25 hp Evinrude, and all my tools. It is also great to runabout in on the weekends with my girlfriend and her daughter. I highly recommend this boat for anyone who wants a work or play boat, big enough to get people and gear around. Very economical and affordable. I loved it so much, I just bought the 330 as a dinghy for my 50' boat.

Estoy interesado en el ( 18 SD 518 , estoy retirado y me dan muy poco, si lo bajas de precio me avisas. Gracias

En cuánto tiempo lo mandan


I haven't had any issues with mines since I got it about 2 years ago. Its large and strong, I can fit lots of people in it. Wish I would have had more color options.

Bought the 18ft boat 4 years ago. Put a 20hp Honda with hydro foil on it and have been using it in the San Juan’s Islands Washington as the primary boat. Have hauled building supplies, people, garbage, crabbing and fishing in it. It gets used as a pickup. Zero issues and will by another one if I ever wear this one out.

Order extra valves and extra proper valve adapter for your pump. I discovered a cracked valve in my new boat which had to have happened in shipping. If I had ordered extra valves this wouldn't be a problem bc they are quite easy to change with the included valve wrench.

Store covered or indoors especially warm days. The boat will get very taut from air expansion in the sun.

My reason for 4 not 5 stars is:

The boat assembly is a 2 man job. The aluminum decks are very difficult to install alone. Very.

Great customer service from Eliot who responded promptly to emailed questions. Service gets 5 stars.
1 2
Write a review

Recommended Accessories