PetraTools' Max Mulch Glue is an innovative garden and lawn care solution designed to firmly bond any landscaping material. After you spread mulch, pea gravel, wood chips, pine straw, shells, or sand in your landscape beds, simply apply a coat of our mulch glue. This adhesive spray will firmly lock mulch and other bedding materials in place preventing erosion and washout. Retaining an even layer of mulch is important, because it helps lock in moisture and provides protection for your soil.