Easily apply with most spray equipments. This ready to use colorant for mulch turns old weathered and bleached mulch to a bright brand new look. It's water-based, easy to apply, extremely durable, looks natural. Brown Bark Mulch Colorant Preloaded In Gallon Pump Sprayer By Bare Ground Just Scentsational's 1 Gallon pump sprayer pre-loaded with Brown Bark Mulch Colorant is a permanent dye which restores color of old faded mulch.