... thick metal film core inside, heat generated fast to the top in 3 minutes. . Glue flow adjustment designed for glue jet,easy ... block up emerged. FUNCTION:. The glue gun can be used in many surfaces,such as wood,plastics,foam,fabrics,paper,cardboard ... a leaky rain gutter.. You may also use the gun in repairing chairs,restoring furniture, lauing electrical circuits as well as ...