Permatex’s Prussian Blue aids precision-fitting of machined surfaces and locates high spots on bearings, valves, gears and other close-to-tolerance components. Prussian Blue is a non-drying, easy clean-up formula.

Permatex® Prussian Blue is a non-drying blue, oily paste type pigment designed to identify points of interference and high spots on precision parts to be fitted. It speeds tracing and precision fittings of close tolerance assemblies. Makes improper fitting high spots immediately visible as bright blue streaks