Reinforced Polyurethane Foam (RPF), commonly called "Coosa", is a high-performance composite material combining the lightweight core of closed-cell foam with the strength and rigidity of fiberglass reinforcement. This combination results in a material that is exceptionally lightweight, yet highly durable and structurally stable. The closed-cell foam core ensures zero water absorption, making the material completely rot-proof and resistant to moisture, mildew, and corrosion. These properties make RPF an ideal choice for applications in marine, transportation, architectural, and industrial sectors where strength, weight reduction, and long-term durability in harsh environments are critical.