Introducing BioBarrier Root and Weed Control. BioBarrier's nodules on the durable geotextile drainage fabric contain trifluralin. Proven by more than 35 years of agricultural use, trifluralin is an effective, non-systemic herbicide; it simply creates a zone around your hardscape and landscape investments that inhibits root growth. Available in multiple sizes, use BioBarrier to protect your hardscapes and landscapes on your next project.