COOSA BOARD

COOSA Bluewater Composite Board is a high-performance marine composite panel made from closed-cell polyurethane foam reinforced with fibreglass, designed as a structural replacement for plywood in marine and high-moisture environments.

  • ⚓ Marine Strength

    Fibreglass reinforced composite designed for structural marine applications.

  • 💧 Rot Proof

    Closed cell structure prevents water absorption, rot and delamination.

  • ⚖ Lightweight

    Up to 40–60% lighter than marine plywood while maintaining strength.

  • ⚙ CNC Machinable

    Can be precision cut with CNC for transoms, bulkheads and custom panels.

Choose Your Coosa Board

Compare the two Bluewater variants below, then choose the board that best suits your marine build, transom rebuild or custom CNC project.

stack of Coosa bluewater 20

Bluewater 20

Lighter Option

A lighter weight Coosa board suited to marine panels, decks, bulkheads and other structural applications where reduced weight is important.

Best For
Decks, bulkheads, panels
Strength Level
High strength to weight

Common Uses

  • Marine decks
  • Bulkheads
  • Interior structural panels
  • General composite fabrication

Why Choose It

  • Lighter than higher density options
  • Excellent marine durability
  • Suitable for CNC cutting
  • Great for custom panel work
$568.11
Shop Bluewater 20 CNC Cut Options
stack of Coosa bluewater 26

Bluewater 26

Heavy Duty

A higher density structural Coosa board designed for more demanding marine applications such as transoms, stringers and high load composite builds.

Best For
Transoms, stringers, high load structures
Strength Level
Very high structural strength

Common Uses

  • Boat transoms
  • Stringer systems
  • Heavy duty marine structures
  • Custom CNC structural parts

Why Choose It

  • Higher density for demanding builds
  • Excellent rigidity and durability
  • Ideal for transom replacements
  • Strong option for CNC machining
$751.77
Shop Bluewater 26 CNC Cut Options

Need Coosa Board CNC Cut?

We offer precision CNC cutting for Coosa Bluewater composite board. Send your drawings, templates or dimensions and we can machine custom panels, inserts and structural components ready for installation.

  • Custom pre-cut parts and structural inserts
  • Nested kits for efficient installation
  • DXF, DWG and PDF file formats accepted
  • Quote based service for one-off or batch builds
View CNC Cutting Service Request Cutting Quote

Perfect For:

Boat transoms, deck panels, bulkheads, cabinetry components, seating structures, reinforcement plates and other marine or composite structural parts that require precise cutting and repeatable accuracy.