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WEED PREVENTION TECHNOLOGY: Ready mix silica sand for artificial grass, patios and block paving; high pH formula naturally inhibits weed growth in joints; long-lasting protection resists erosion through rain and weather. EASY BRUSH IN APPLICATION: Patio sand brush-in method requires no specialist skills; simply sweep sand for paving into joints up to five millimetres wide; suitable for flagstones, cobbles, concrete pavers and stone setts. VERSATILE PATIO JOINT FILLER: Works as setting sand for patio slabs, driveway sand with weed killer; compatible with Indian sandstone, paving blocks and all natural stone; water permeable for proper drainage. PROFESSIONAL GRADE BUILDING SAND: Each bag of sand covers five to ten square metres depending on joint width; kiln sand for block paving weathers naturally maintaining a fresh appearance; self-setting paving jointing compound alternative. QUALITY SPECIFICATIONS: Twenty kilogram bags of dry kiln sand; available in beige and grey paving sand options; apply to free-draining foundation with clean joints; mix contents well as sharp sand for paving may settle during transit.