Suitable for use on: Bricks - Class A Engineering, Class B Engineering, Standard Facing Bricks Clay Products Concrete Beams, Kerbs, Pipes and Slabs Block Paving Flag Stones Flint Aggregate General Purpose Concrete Heavy Steel Reinforced Concrete Light Steel Reinforced Concrete Roof Tiles Light Density 3 to 7 Newton blocks (occasional use) Medium Density 7 to 12 Newton blocks Solid Density 12+ Newton blocks Granite blocks and worktops Limestone Sandstone Indian (occasional use) York Stone