#4 Midwest Gray, 30 Minute Set Blendcrete in a 50 Lb. Pail is a single-component, polymer-modified, cement-based concrete and masonry patching compound, requiring only the addition of water. Used for interior or exterior, above or below grade and on vertical and horizontal surfaces, to repair surfaces needing 1/2” to 2” coverage. Coverage can be extended beyond 2” with pea gravel. Available in 15 or 30 minute final set times, in several shades of gray and white. Standard packaging are 50 lb bags.