Abstract: A magnetic strip assembly for signs is provided for use in attaching a sign to the surface of a structure formed from a ferromagnetic metal. This device, which utilizes solvent welding or instead of pressure sensitive adhesives, allows for a more effective attachment of signs to metal surfaces. Other devices for the attachment of signs to metal surfaces utilizes pressure sensitive adhesives which are prone to adhesive failure, which is not a problem with this device. This magnetic strip assembly includes a flexible magnetic strip preferably with two flanges thereby creating a slot, a flexible mounting strip which is inserted into the slot of the magnetic strip thereby providing for mechanical interconnection, and a plastic sign which is fastened to the mounting strip by means of solvent welding. The solvent weld provides an extremely effective means of adhesion.