Versatile Landscape Mulch & Gravel Glue: Trust the experts. Unlike standard adhesives, our gravel glue penetrates deep to create a stable surface that prevents rain washout and wind scattering. Mulch Glue, Rock Glue for Landscaping, Pea Gravel Binder 2 Gallon Max Cover, Strong Mulch Anchor, Rock Lock Landscape Adhesive for Slopes, Flower Beds, Driveway Edges, Fast Dry & Safe for Plants Pets.