Precision Brand 06475 - Plastic Masonry Shims
It has excellent stability, eliminates rust stained concrete, etc Less expensive and more versatile than steel Convenient thicknesses, lengths and widths Assures accurate placing and leveling of precast panels, tilt-up walls, structural and architectural components Will not rust, rot, stain or leach concrete Available in convenient thicknesses, lengths and width which permit precise leveling and alignment.