Manufacturer of SATURN Inflatables Since 1999

18' Inflatable Boats SD518

Short description:
MSRP: $3,798.00  
In stock

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.

Go Big or Go Home! It always better to have more boat on a water than less. Saturn SD518 is a largest inflatable boat in a SATURN line up of inflatable watercrafts. It comes with heavy-duty aluminum floor, and Its ready to be used as commercial work boat, for fishing or diving, or just a pleasure cruiser with a bunch of friends.

Saturn Inflatable Boat SD518

18' SATURN SD518 inflatable boats are made from heavy-duty quality PVC fabric, and can handle up to a maximum of 10 persons.

Deflated, the SD518 boat will fold to the size of one large and heavy bag with tubes and another large and heavy flat bag with a floor. Once deflated and folded, the SD518 inflatable boat can be stored in the back of your SUV or minivan, large closet of your apartment or in a garage. Folding hand cart is highly recommended to move deflated boat around. Dinghy wheels are available to move inflated boat on a ramp.

Double layers of fabric at the bottom of the tubes and a rub-strake protector along the keel provide extra protection from sharp rocks and abrasive sand. The safety valve will prevent excessive air pressure in the boat's chambers.

Grommet splash guard with grab safety rope moved off-center to create comfortable seating surface on top of oversized tubes.

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 marine grade 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