Colour Hardener Colour Hardener Colour Hardener is supplied in a dry powder shake, that is sprinkled onto wet, new screeds and wood floated in, essentially becoming part of your floor screed. It is a granolithic concrete material that strengthens and colours concrete floors.“Benefits & Characteristics”Interior and exterior useExtremely durable and hardwearingBeautiful natural, earthly finishEasy to MaintainVersatile applicationNeed expansion joints“View colour chart”“View datasheet”“View brochure”Source: Cemcrete