Description Ready to use. For grouting concrete masonry walls, laying flagstone, and paving bricks. Recommended for use in applications where concrete is needed in less than a 2' thickness. For patching and topping chipped concrete surfaces. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov