Your one stop source for casting Impregnation Segment leader offering a wide array of product options in Vacuum Impregnation Plants, Impregnation Sealants, Casting Defects and Rectification Products....Micro Porosity in castings and powder metal parts can result in pressure leak paths and poor quality surface finishes. Impregnation is a permanent solution to this problem as Vacuum Impregnation will fill voids and defects with stable yet flexible material.