This acid cleaner is made for professionals to clean and descale brickwork, stone and concrete, quarry tiles etc and for metal derusting. Please note: do not use on or near linoleum, terrazo, marble, acid sensitive stone, stainless steel, chrome or enamel. Contains hydrochoric acid. pH: 1 Dilution: 1:4 5L Concentrate Removes cement and plaster splashes, ideal for initial cleaning Cleans and etches concrete floors, ensures effective 'key' for seal application Removes industrial grime and stains