Moss B Ware, 3 LB, Moss Killer, Extends Life Of Roofs, & Improves The Condition Of Patios & Walkways, Won't Stain Roofs Or Corrode Aluminum & Galvanized Gutters If Uses As Directed, Use Any Time Of The Year, 99% Zinc Sulfate Monohydrate, Can Be Used On Structures Made Of Composition, Wood, Concrete, Metal, & Asphalt, For Decks, Roofs, Patios, & Walkways, Apply Either In Dry Form Or Mix With Water, Shaker Container, Not Available In CA.
