StainClean pickling paste is used for cleaning and passivating of welding joints and the heat affected zone (HAZ) for welded stainless steel constructions. Pickling paste is applied with a paintbrush. After pickling and generous flushing with water (high pressure), the corrosion resistance of the weld site is restored. StainClean has an extraordinary good adhesive capacity and can be applied on vertical surfaces and ceilings without any risk of running or drying. Stainclean Green pickling paste is a pickling paste with an entirely new formula. The paste is virtually free from formation of toxic, nitric gases.