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Wave Defender™

Wave Defender® protects your dock from rough waves caused by boat wakes and wind. It reduces your dock’s rocking and rolling motion, thereby reducing dock wear and tear.

Wave Defender® stabilizes your floating dock just as well as commonly used heavy weights but without requiring additional floatation to maintain freeboard. It can be used with both new or existing docks, allowing you to relax and better enjoy your time on the water.

Wave Defender® attenuates waves and may serve as a breakwater to protect residential and commercial floating docks.

The Wave Defender® system is made of two special types of extra thick, double-flanged, Permafloat® shells bolted together and to the underside of a dock. The top shell is a sealed float filled with expanded polystyrene (EPS), and provides dock buoyancy. The bottom component is an empty shell with holes that fills with about 1100 lb of water during installation. When a wave strikes and attempts to move the dock, the water in the lower shell cannot be quickly expelled. This causes it to momentarily act like a thousand-pound weight, reducing the motion of the dock and increasing its stability in wave action.

Wave Defender® has a huge advantage over alternatives such as concrete weights that permanently decrease buoyancy and thus incur not only the cost of the weights but also additional floats to offset these weights to maintain freeboard. Since the lower Wave Defender float filled with water has neutral buoyancy, it does not decrease overall dock buoyancy and compromise freeboard like a permanent weight does.

Wave Defender® float shells are seamless, 48 x 36 x 20 inches in size, and are manufactured by rotational molding using a tough, 100% virgin, superior grade polyethylene material. UV inhibitors are used for long life and resistivity to oil, gas, salt water, and debris. With a nominal thickness of 0.200 inches, they are much thicker than standard rotationally molded dock floats. Wave Defender® float shells have molded-in slots and very tough flanges to meet forces imparted by wave action for years. The filled float has a buoyancy of 1,088 lb when fully submerged.

Double Flange Wave Defender Float Wave Defender/Attenuator System

Standard Float on Left... Wave Defender™ on Right



  Permafloat 36" x 48" x 20" Double-Flanged
  Wave AttenuatorTop Float (Foam-Filled)



  Permafloat 36" x 48" x 20" Double-Flanged
  Wave Attenuator Hollow Bottom Shell



  DF-C-WA-JK   Wave Attenuator Joiner Kit

  Kit Includes:
  10  3/8” x 4” Stainless Steel Hex Bolts (Full Thread)
  20  3/8” x 1-1/2” Stainless Steel Fender Washers
  10  3/8” Stainless Steel Nylon Lock Nuts


Special Shipping:  
Items marked "Special Shipping" require special shipment via freight truck instead of UPS or FedEx ground. The online checkout will calculate an approximate shipping charge. If the actual shipping charge is different, then one of our customer service representatives will contact you to notify you of the exact shipping charges before your order is processed.  If you would like an exact freight quote prior to placing an online order, please call us at 1-800-677-4710.

Please note that freight truck shipments require that someone be present to sign for the delivery and to help unload the truck.





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Prices shown are in U.S. Dollars and do not include freight, applicable federal, state or local taxes, customs duties or export packing charges.
Prices, specifications and availability of items are subject to change without notice. All orders are subject to our Terms & Conditions.