Kills Poison Ivy and Tough Brush. Kills the Roots. Guaranteed. Kills all types of tough weeds and brush including poison ivy, poison oak, kudzu, wild blackberries and other invasive weeds. Rainproof in 30 minutes for control that won't wash away. Exclusive Roundup Formula contains two of the best brush killing ingredients. Use on wooded lots and other areas where brush and tough weeds invade your yard. Pull 'N Spray applicator eliminates hand fatigue. One pull equals 25 trigger sprays.