5,000 SQFT, Fast Acting Lime, Extremely Fine Lime Combined With Patented AST Polymer Formulation, Up To 10 Times Faster Than Typical Lime, Raises pH in Acidic Soils, Putting Dormant Fertilizer & Nutrients To Work In The Lawn; Use In Any Spreader. The AST Polymer Changes The Electrical Charge in the Soil Creating a Positive/Negative Attraction Between Soil And Nutrients. Consequently The Lime And Nutrients Bind to The Soil So That Rain and Sprinklers Do Not Flush Nutrients Through The Soil. This Maximizes The Efficiency And Use Of the Lime So That A 40# Bag Covers 5,000 Sq Ft, or 5X The Coverage Of Regular Pelletized Lime. This Also Prevents Environmentally Damaging Fertilizer Run-off.