This is a semi-gel type of chemical and is used to pickle & passivate large surface area with a spray pump. It also simultaneously removes annealing colours, ferritic contamination and weld burns. "K-2" spray is very safe, convenient and easy to use for cleaning large vessels, agitators, tankers, boilers, heat exchangers pressure vessels, storage tanks etc. It also restores the Mill finish. This form of "K-2" cleans 30 –40 sq ft.area with 1 kg. of chemical.