Rainbow Mulch is a tire-free, non-toxic, 100% naturally-derived sponge rubber mulch. The primary ingredients are raw rubber and earth. Our proprietary mixture contains zinc, baking soda, sulfur and stearic acid. Our formulas are FDA and Proposition 65 compliant and made with food-grade colorant.
Rainbow Mulch is USA made. It is created from scratch to ensure it is the safest, most natural sponge rubber mulch available.
Rainbow Mulch is not made of used tires. Rubber mulch that has been recycled from used tires may contain chemicals or additives that were used to create the tire, including wire or steel, polyester, nylon or rayon.