Crete Delete concentrate is a 100% active product. Used as directed, it will remove excess concrete from concrete trucks, concrete pumpers, mixers, tools, forms, equipment, etc. without using corrosive mineral acids. The organic acid in Crete Delete will, over time, not only remove unwanted build up, but will provide a residual effect that makes subsequent cleaning easier. If equipment being cleaned has older build up or cured concrete, multiple applications may be required.