Yellow spots from pet urine burn can ruin a beautiful green lawn. This product instantly colors burned spots with a natural green color. Then the product's natural enzymes speed up the breakdown process of pet urine to help grass grow back faster. A wonderful product to have on hand to keep your yard looking its best. Lawn Spot Away Should be used as soon as yellowing is noticed and can be used weekly. Once it is completely dry, the product will not wash away. The color might fade after a few days in the sun and can be reapplied.