Roundup Quick Pro is absorbed quickly by plants and is rainfast in about an hour. This super-fast dry time means rain won’t wash the Roundup away as easily and it works much faster than typical glyphosate products. Get control of a wide range of weeds including poison ivy, poison oak, and poison sumac. Roundup QuikPRO is an easy to use, non-selective professional grade herbicide for use on a variety of industrial and non-cropland sites. The active ingredient is soaked through the leaves and travels to the roots killing the plant within 1 to 2 days.