Fast action, ready to use Weed Killer effectively controls annual and perennial weeds & moss. Acetic acid formula with no Glyphosate naturally breaks down leaving no residue with visible results after 4 hours, dependent on weather conditions, achieves full control after 24 hours. Use on hard-standing surfaces not intended to bear vegetation, including patios, paths, gravel, driveways and block paving with one bottle providing up to 10sqm of coverage.