Scotts roundup concentrate plus works fast with results in 12 hours, and rain proof in 30 minutes. Active ingredients: glyphosate 18%, diquat dibromide .73%. Glyphosate targets an enyzme found in plants, but not people or pets. For use along fences, on driveways/walkways, around trees, and around flower beds. Able to plant 1-3 days after application. Mix 6 fl. oz. per gallon of water.