Surfactant for herbicides is a wetting agent with 80% non-ionic surfactant for increasing the penetration, coverage & Overall effectiveness of almost any herbicide. Surfactant for herbicides can be used with almost all herbicide sprays including Trimec, atrazine, brush Killer & 2, 4-D amine. Please Check the herbicide product label first to see if a surfactant is recommended. Reducing the surface tension of water to insure more uniform coverage and penetration of weed killers.