Just Scentsational’s 1 Gallon pump sprayer pre-loaded with Red Bark Mulch Colorant is a permanent dye which restores color of old faded mulch. 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. It works very well as a permanent colorant on both natural and rubber based mulch. Easily apply with most spray equipments. Product can stain concrete and other hard surfaces when dry, please use drop cloths and measures to prevent unwanted over-spray. One gallon will cover 300 square feet.