Can be used on Non Abrasive Indian Sandstone, Hard Facing Brick, Medium Facing Brick, Hard Slate, River Gravel Aggregate Concrete,Flint Aggregate Concrete, Reinforced Concrete, Concrete Kerbs, Concrete Slabs, Reinforced Lintels, Hard Limestone, Limestone Aggregate Concrete, Concrete Paviours, Soft Facing Brick, Concrete Block Over 15kn and Hard Sandstone