Wave Defender® Attenuators – Built for Dock Stability and Long-Term Performance

Built-in Strength. Built to Protect.

The Wave Defender® Attenuator, manufactured by Roto Marine Products™ by Cellofoam®, is a robust, engineered solution designed to significantly reduce dock movement caused by waves, boat wakes, and wind. Built to perform in demanding marine environments, this system protects docks by acting as a stabilizer—minimizing rocking and rolling to create safer, longer-lasting installations.

How It Works: The Wave Defender® features a dual-shell system. When installed beneath the dock, its lower shell fills with water but does not expel it easily upon wave impact. This resistance to rapid water displacement dampens the energy of incoming waves, dramatically reducing dock motion and wear. The result? Improved dock stability, reduced structural stress, and a better experience for marina operators and boaters alike.

Key Features & Specs

• Standard Size: 48" L x 36" W x 20" H (3 ft x 4 ft x 20 in)
• Material: Rugged, rotationally molded polyethylene shells for extreme durability
• Attachment: Compatible with new and existing wood, steel, or aluminum docks
• Customizable Ventilation: Comes with a standard nine-hole pattern or a single-vent option for builder flexibility
• Stabilization Effect: Filled lower shell creates a natural dampening system that helps docks stay put during rough wave action
• Corrosion-Resistant: Resistant to sun, oil, gas, marine life, and debris—perfect for long-term use in marinas

Built-in Value for Contractors & Marinas

• Reduce warranty and maintenance costs with stabilized docks
• Create higher-end, safer docking systems that stand out to customers
• Offer a proven, engineered solution that adds immediate value to any build

Recommended Use: Pair the Wave Defender® with Permafloat® dock floats for the ultimate in buoyancy and wave resistance—ideal for high-traffic marinas, coastal docks, and private boat slips facing wake exposure.