Whether you own a boat or manufacture marine equipment, one of the most important considerations is flotation foam.
Understanding what it is, how it works, and why the right materials matter can make a big difference in performance and safety.
At FSI, we specialize in polyurethane systems for the marine industry. Our expertise ensures flotation devices, seating, insulation, and other marine products perform safely and consistently, even in the most challenging environments.
Why Marine Foam Matters
Marine flotation foam is designed for buoyancy and durability. It must repel water to prevent sinking, mold, and mildew. Without this property, foam would quickly degrade in marine environments.
Closed-cell polyurethane foams are the standard for flotation. They offer:
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High compressive strength
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Dimensional stability
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Resistance to water absorption
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Long-lasting performance
These qualities make closed-cell foam the preferred choice for both small- and large-scale marine applications.
Types of Foam for Marine Applications
Marine Flotation Foam
Marine flotation foam is specifically made for marine use and meets or exceeds U.S. Coast Guard requirements (33 CFR §183.114). FSI’s Ecomarine® is durable, adheres to substrates, and is ideal for:
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Flotation devices
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Stringers and hulls for boats under 20 feet
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Live wells
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Channel marker buoys
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Built-in coolers
Flexible Foam
Flexible foam systems are built for comfort and long-term performance. FSI’s Ecoflex® and Genflex™ foams provide energy absorption, low fatigue loss, and tear resistance. Common applications include:
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Boat seating and cushions
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Steering wheels
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Dashboards
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Interior marine products
Integral Skin Foam
Integral skin foam is perfect for applications that require customized density, skin thickness, or hardness. FSI’s Ecoflex® integral skin foams also offer UV stability and decorative surface finishes. Typical uses include:
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Steering wheels
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Consoles
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Hand grips
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Custom interior components
Ecomarine® Advantages
Powered by Ecomate® technology, Ecomarine® meets key environmental regulations without compromising performance. It is:
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Non-marine pollutant
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Buoyancy compliant
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Pollutant free
- PFAS-Free
- VOC Exempt
- Zero ODP
- Zero GWP
- SNAP Approved
Buoyancy and Performance
Not all buoyant foams are created equal. For marine applications, look for foam that combines:
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High buoyancy
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Water resistance
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Mold and mildew protection
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Durability and compressive strength
Closed-cell spray foam is ideal because it prevents water or air from penetrating the material while maintaining flotation and long-term reliability.
FSI for Marine Foam Solutions
For more than 50 years, FSI has developed specialized polyurethane systems for the marine industry. Our products serve manufacturers, repair specialists, and hobbyists with compliant, high-performance, and sustainable solutions.
FSI marine foams meet regulatory requirements and use environmentally responsible blowing agents for better performance today and in the future.
Contact FSI to learn more about our flotation foams and find the right solution for your next marine application.
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