compositions , composite articles and process for producing same are provided from a reinforced polyvinyl halide composition comprising a high molecular weight polyvinyl halide resin , a plasticizer , and a reinforcement material , such as glass fibers , in combination with a composition having adhesion to . preferably comprises a thermoplastic compound selected from the group consisting of pvc , plasticized pvc , styrene derivatives , urethane derivatives , acrylic derivatives , acrylonitrile derivatives , polyester derivatives , and mixtures thereof , with the most preferred composition being an unreinforced , plasticized polyvinyl halide composition . the composite article exhibits good strength , low sag at high use temperatures , and lowered coefficient of thermal expansion for use in contact with metal or polymeric substrates such as panels . the composite having a coefficient of thermal expansion not significantly different than the substrates in contact therewith , provides enhanced permanence of adhesion and sag resistance .