COLORBACK 12,800 Sq. Ft. Mulch Color Concentrate, 1-Gallon, Black Treats up to 12,800 square feet of existing black mulch area Makes 32 gallons of colorant For use in a pump sprayer Preserves existing ground-cover 3-4 times longer than non-treated areas, saving time, energy and money COLORBACK 12,800 Sq. Ft. Mulch Color Concentrate, 1-Gallon, Black