18' PRO Inflatable Boats SD518V2

New PRO 18' SD518 V2 now comes with aluminum transom and more.

The latest 2025 model SD518DG V2 PRO now comes equipped with an aluminum transom, 4 rod holder mounts, built-in Velcro MOLLE system, rowing oarlocks, a convenient cargo area on top of the tubes, and multiple D-rings all over!

Saturn PRO Series Upgrades

✅ Aluminum Transom – Rot-proof, ultra-durable with PVC-aluminum bonding and wheel brackets.
✅ Optimized Splash Guard – Dual-layer design for cargo space, secure tie-downs & top of tube seating.
✅ Versatile D-Rings – Heavy-duty placements, including tow & anchor D-rings for added function.
✅ Fishing & Accessories Ready – Universal rod holder bases for Scotty/Railblaza rod holders and gear.
✅ Upgraded rowing oars – New model now comes with oarlocks and rowing oars.
✅ MOLLE Velcro System – Tactical customization for pouches & accessories.
✅ Larger Models, More Chambers – Five independent air chambers for extra safety.
✅ Reinforced Durability – Extra-wide 0.9mm PVC protection along tube bottoms & extra wide rub strake over keel. 

Meet the Ultimate Upgrade – Saturn PRO SD518DG V2! Unleash the next level of adventure with premium German Heytex PVC, heat-welded seams, and a rock-solid aluminum transom for unbeatable durability. Now safer than ever with five independent air chambers, setting it apart from the standard SD518 V1. Stronger, tougher, and built to perform – are you ready?

Go big with the SD518, the largest inflatable boat in our lineup, designed to impress and exceed expectations. Whether you're looking for a commercial workhorse, a reliable fishing and diving companion, or a spacious pleasure cruiser for unforgettable outings, this boat delivers on all fronts.

Made from heavy-duty PVC fabric, the SD518 comfortably accommodates up to 10 passengers, ensuring plenty of room for everyone. When the adventure is over, simply deflate 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.

See how many people can fit into SD518 V1 boat. New boat V2 even longer now.

Safety comes first with the SD518 V2, featuring double-layered fabric, a rub-strake protector around the tubes, extra-wide reinforcement along the keel, and a safety valve to prevent overinflation. With five independent air chambers, this boat is built for stability and virtually unsinkable.

Designed for maximum convenience, it includes an all-around rope grab line, flat air valves, and stainless steel D-rings for easy towing. Every detail enhances your time on the water.

Equipped with a repair kit, three seat benches, and carry bags, you’ll have everything you need for your next adventure. To get you started right away, we’re also including a complimentary high-volume hand pump.

Upgrade to the SATURN PRO version of SD518 today and take your water adventures to the next level! Explore our optional accessories to customize your experience.

18' SD518 V2 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. Please see important warnings about aluminum floor installation at bottom of this page.

Aluminum Transom Benefits

• Durable & Strong – Corrosion-resistant, long-lasting, and ideal for all waters.

• Lightweight – Reduces boat weight for better speed, fuel efficiency, and transport.

• Low Maintenance – No sealing, painting, or replacing like wood.

• Better Outboard Performance – Rigid, reduces flex, improves propulsion and handling.

• Corrosion-Resistant – Treated/alodized for harsh marine conditions.

• Eco-Friendly – 100% recyclable, unlike treated wood.

• No Water Absorption – Stays strong without rot or weakening.

• Modern Look – Sleek, high-tech aesthetic for style-conscious boaters.

SATURN SD518 INFLATABLE BOATS FEATURES:

• All around rope grab line.
• Separate internal air chambers.
• Easy flow drain valves with a 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.
• Heavy-duty aluminum transom with brackets for optional wheels.
• 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 V1 with 25HP Motor.

Customer's Video Fishing From Saturn SD518 V1.

Customer's Video Riding Saturn SD518 V1.

Customer's Notes on Inflation.

Aluminum Floor Installation Instructions:

1. Review Installation Steps: For detailed installation instructions, please refer to the aluminum floor installation guide.
2. Inflating Boat Tubes and Keel: Before operating your boat in choppy waters, ensure that the boat tubes and keel are fully inflated to the maximum recommended pressure to prevent damage to the floorboards. For more information on air pressure, please consult this FAQ section. Underinflated tubes and keel can lead to aluminum floor cracking. Please see different FAQ for more info on that.
3. Preparing to Install Stringers: When installing the stringers, position the oars beneath the bottom of the boat to elevate the edges of the floorboards off the ground.
4. Installing Stringers: Stringers are designed to connect two adjacent main floorboards. Each main floorboard consists of smaller sections that are joined by C-channels at the edges. For optimal alignment, ensure the spaces between adjacent stringers do not line up with the joint lines between the smaller sections of each floorboard.

Quick Tip! Worried about the weight of a hard-floored boat? No need to strain your back! Pick up a foldable hand cart from any retail store to easily transport your folded boat. Even budget-friendly dolly movers work wonders for both folded and fully inflated boats. For extra ease, consider our dinghy dolly wheels—perfect for rolling your inflated boat across the shore and right into the water!