About Liberty Classic Stone Available in an assortment of stylish colors, it’s easy to select the perfect look for any project. The beauty of Liberty Classic Stone Installed by masons just like brickNominal 3” bed depthRequires little or no on-site alterationExcellent color retentionLess than half the weight of natural stoneBox-packaged product for clean, neat job sites30-year limited warranty* Liberty Classic Stone offers: Color retention – Only permanent mineral oxide colors are used. Only limited color change can be observed even after years of weathering.Noncombustible – Listing my Underwriter’s Laboratories shows zero flame spread, zero fuel contributed and zero smoke contributed.Freeze-Thaw Durability – Tested in accordance with ASTM C67 and also in accordance with ASTM C666A.Low Absorption – Tested in accordance with UBC Standard No. 32-12.Density – Tested in accordance with ASTM C567. Shipping weight is approximately 16-18 lbs. per square foot.Compressive Strength – Tested in accordance with UBC Standard No. 26-10, Parts I & IV.Tensile Strength – Tested in accordance with ASTM C190.Flexural Strength – Tested in accordance with ASTM C348.Portland Cement – Tested in accordance with ASTM C150 standard specifications.