Suitable for use on: Class A and B Engineering Bricks Standard Facing Bricks Clay Products Concrete Beams, Kerbs, Pipes and Slabs Block Paving Flag Stones Flint Aggregate General Purpose Concrete Green Concrete (up to 24 hours old) Concrete Blocks Lightweight 3 to 7 Newton / Medium Density 7 to 12 Newton / Solid Density 12+ Newton Cement Screed Limestone Marble Blocks and Worktops Sandstone Abrasive Sandstone Indian Yorkstone