Gravi-Tech polymer-metal composites are a high-performance thermoplastic-based alternative to lead and other traditional metals. Gravi-Tech compounds use a variety of metallic fillers to deliver similar densities to traditional metals, while offering the design flexibility and processing ease of thermoplastics. These materials can be easily used with conventional molding or extruding equipment. Custom formulations of Gravi-Tech polymer-metal composites can be developed for a wide range of parameters. In addition, when Gravi-Tech is substituted for lead in radiation-shielding applications, manufacturers avoid the regulatory, disposal, and employee exposure challenges associated with lead.