It is the process in which fibres are pulled into resin and then allowed to pass through heated die. Pultrusion is a molding process for producing structural members of uniform cross-sectional area. Solid and hollow structures can be processed easily by the pultrusion process.

Pultrusion machines use shaping and curling to manufacture rods, tubes, and structural shapes with specified cross-sections. Pultrusion is a low cost with higher-strength method for manufacturing solid or hollow profiles like flat bars, channels, pipes, tubing, rods, etc.