Coosa® Composite Boards for Marine Construction
Since , Coosa Composites has led the market with fiberglass-reinforced polyurethane panels engineered to replace marine plywood. Fisheries Supply stocks a broad selection in multiple densities, thicknesses, and sheet sizes—ready to ship nationwide and worldwide.
Key Takeaways
- Lighter than plywood: Bluewater and Nautical panels deliver high strength at significantly lower weight than marine plywood, with no rot or water absorption.
- Two primary series: Bluewater (structural: transoms, stringers, bulkheads) and Nautical (semi-structural and interior builds).
- Workable & durable: Closed-cell polyurethane core reinforced with continuous-strand fiberglass; machines with common composite/wood tools.
- Inventory and support: Standard sheets (24"×48", 48"×96") and thicknesses 1/4"–2" in stock; expert help for series selection and layup.
Shop Coosa Composite Boards at Fisheries Supply
Choose from the industry’s leading marine composite panels. Our inventory serves United States and international projects, with fast fulfillment for boatyards, OEMs, and DIY projects.
Why Choose Coosa Board for Your Boat Project?
Coosa panels are constructed from high-density, closed-cell polyurethane foam reinforced with continuous-strand fiberglass—delivering the stiffness-to-weight performance modern marine structures demand.
- Lightweight strength: Engineered for high strength-to-weight performance; significantly lighter than plywood while maintaining structural capacity.
- Rot-proof & moisture-resistant: Closed-cell core will not absorb water; impervious to rot, mold, and mildew.
- Long service life: Stable, dimensionally consistent core that supports durable laminates and sandwich construction.
- Efficient and easy to machine: Cuts, routs, and bonds using standard composite practices and epoxy/vinylester/urethane adhesives.
Explore Coosa Composite Series
Bluewater Series — Structural Core: Use in high-load locations such as transoms, stringers, engine beds, and bulkheads. Bluewater 26 (˜26 lb/ft³) is the stiffest, highest strength-to-weight panel in the lineup. Nautical Series — Semi-Structural / Interior: A lighter, economical option for decks, cabinetry, liners, and lightly loaded panels. Nautical 20 (˜20 lb/ft³) is commonly chosen for weight savings where full Bluewater strength isn’t required.
Sizes, Thicknesses, and Densities
- Sheet sizes: 24"×48" and 48"×96" (additional sizes available by request).
- Typical thickness range: 1/4" to 2".
- Densities: Bluewater (e.g., 26 lb/ft³) for structural; Nautical (e.g., 15–24 lb/ft³) for semi-structural.
Need other formats or bulk quantities? Contact our sales team for quotes and lead-time options.
Where to Buy Coosa Composite Panels
Looking for Coosa board near you or online? Shop our live inventory with competitive pricing and rapid fulfillment. We support OEM boatbuilders, professional yards, and advanced DIY refits.
For Marine Professionals
Whether you’re outfitting a production line or retrofitting a sailboat, Coosa boards deliver the reliability and workability pros demand. For layup schedules, adhesive compatibility, and reinforcement selection, consult our team and Coosa’s technical data.
Need Help Selecting the Right Coosa Board?
Not sure which series fits your build? Our materials specialists can help you match density and thickness to the job—deck cores, cabin soles, bulkheads, and more.
For deeper background, read our guide: Coosa Board composites.
Frequently Asked Questions
What’s the main difference between the Bluewater and Nautical series?
Bluewater panels have higher density and stiffness for structural loads (transoms, stringers, bulkheads). Nautical panels are lighter and economical for semi-structural or interior applications.
Will Coosa board absorb water or rot?
No. Coosa boards use a closed-cell polyurethane core reinforced with fiberglass, so they do not absorb water and are rot-proof.
Can I bond and laminate Coosa with standard marine resins?
Yes. Coosa panels are compatible with common marine resin systems (epoxy, vinylester, polyester) and standard adhesive/bedding practices.
What tools do I need to machine Coosa board?
Standard woodworking/composite tools (carbide-tipped saws, routers, sanders) work well; observe dust control and PPE per the Safety Data Sheet.
What sheet sizes and thicknesses are commonly stocked?
24"×48" and 48"×96" sheets, typically 1/4"–2" thicknesses. Contact us for additional sizes or bulk orders.