PST produces the world’s first and only vacuum systems capable of bonding homogeneous materials to bore surfaces. Our process allows for the application of fully dense, well-adhered material structures to bore surfaces of cylindrical shapes. The EPVD® process is currently suitable for bore diameters ranging from 1/4 inch to 20 inches at lengths of up to 40 feet. The EPVD® is a 100% environmental friendly substitute to Chrome, Cadmium and other hazardous coatings.