The Just Scentsational Bark Mulch Colorant is a permanent dye which restores color of old faded mulch. This ready to use mulch dye turns old weathered and bleached mulch to a bright brand new look. It's water-based, easy to apply, extremely durable, and looks natural. This mulch color renewal works very well as a permanent colorant on both natural and rubber based mulch. Easily apply this red mulch dye with most spray equipments.