The Asahi Glass Co. has successfully developed a new dry-state pellet for injection molding made from a conventional unsaturated polyester resin using styrene monomer as a crosslinking agent. The pellet should meet the following requirements: (1) capable of being molded by usual injection machines for thermosets; (2) significantly improved modability; (3) inexpensive. A description of the new pellet, particularly its principal features and the basic concept such as thickening, moldability and toughness is given in this paper. Molding conditions for new molding GRP molding materials are detailed and properties of molded components are tabulated.