MR® SmartChoice SC20 is an exclusive low-cost edition by MR® Chemie for sale in select channels only. is an NDT-approved non-halogenated solvent-based cleaner/remover for pre-cleaning (removes oils, greases and other contaminants) and removing excess surface penetrant from an inspection area before applying developer during liquid penetrant testing. It dries optimally without leaving any residue on the surface.