FM4910 is the fire retardant property standard established by Factory Mutual System, a worldwide industrial insurance organization, for materials used in clean room applications. Test criteria for the selection of materials for clean rooms are presented. The criteria deal with limiting fire propagation and limiting contamination of the clean room environment by smoke. Professional Plastics is a supplier of plastic sheets, rods, tubes, films and pipes used in the construction of cleanroom equipment and furniture. We offer a full range of fire-safe FM 4910 approved materials.