Princep® 4L Herbicide is a professional-grade liquid pre-emergent herbicide formulated with simazine to deliver long-lasting control of more than 40 annual grassy and broadleaf weeds. This 4L formulation provides reliable residual activity and is absorbed primarily through weed roots to stop growth before emergence. Widely used in turfgrass, orchards, nurseries, corn production, and non-cropland sites, it offers flexible application across many use areas.