Blue Spray Marker - (8 Ounces) - Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide MarkerBrand: Bluewater Chemgroup Color: Blue Features: Easily Marks Grass and Lawns Works great with herbicides as well as fertilizers & insecticides Has a blue colorant that indicates where you have applied a chemical spray Non Permanent and Will Not Stain Binding: Lawn & Patio Part Number: 154 Details: Blue Spray Marker is a non toxic concentrated colorant designed to be used with herbicides, fungicides, pesticides, and fertilizers. Spray Marker indicates