COLORBACK 6,400 Sq. Ft. Mulch Color Concetrate, 1/2-Gallon, Black Treats up to 6,400 square feet of existing black mulch area Makes 16 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 6,400 Sq. Ft. Mulch Color Concetrate, 1/2-Gallon, Black