Dual-action formula works two ways: kills existing weeds and grasses to the roots and prevents any new weeds and grasses from growing for up to 4 months. Visible results in 6 hours. Rainproof protection in 10 minutes. Pull "N Spray applicator eliminates hand fatigue. One pull equals 25 trigger sprays! Ideal for large jobs. 1.33 gal. Pull "N Spray.