Precision Brand 06410 - Plastic Masonry Shims
It has excellent stability, eliminates rust stained concrete, etc. it has less expensive and more versatile than steel Convenient thicknesses, lengths and widths. It has assures accurate placing and leveling of precast panels, tilt-up walls, structural and architectural components and, It will not rust, rot, stain or leach concrete with available in convenient thicknesses, lengths and width which permit precise leveling and alignment.