It is an automated continuous production process of GRP profiles, which allows obtaining any type of longitudinal profile with a magnificent surface finish and a high percentage of fiberglass. The piece is preformed starting from a series of reinforcing fabrics and threads. These after being impregnated with the polymer matrix is passed through the mold, in which it is polymerized, thus obtaining the desired profile. In this process, great mechanical resistance is achieved with an excellent surface finish.