Compare N Save, Gallon, Concentrate, 41% Grass & Weed Killer, Contains 41% Glyphosate Plus Surfactant, Kills Weeds & Grass, Roots & All, Single Application, Rainproof In 2 Hours, Visible Results In As Little As 2 To 4 Days, Gallon Makes Up To 85 Gallons Of Ready To Use Spray & Treats Over 25,000 SQFT.