Pultrusion is a continuous process that produces composite profiles of constant cross-section made of structural fibers bonded with a polymer matrix. The process starts by passing reinforcing fibers through an impregnation bath containing resin, then guiding the impregnated fibers through dies where heat activates polymerization before exiting the die fully cured. This closed-mold process reduces emissions and ensures high strength and stiffness with minimal environmental impact. Pultrusion allows for cost-effective production of customized profiles for structural applications.