A heavy duty acid based cleaner for removing dirt, grime and unwanted stains from stone, concrete, bricks and blocks. Ideal for removing leaf stains from patio slabs, stubborn algae from block paving, cement and mortar stains from brickwork and rust marks. As of the 1/10/23, the sale of this product is regulated under the new EPP - Explosive Precursors & Poisons Act. Please see the government website for more information on th