KYZEN offers safe and effective metal finishing products which address a wide range of manufacturing requirements, for cleaning and protecting metal parts. For the aerospace industry in particular our solvent line includes the VOC-Free, highly effective and non-flammable cleaning solution. Classified as a non-VOC chemistry, M6920* and has ultra-low MRI and Global Warming Potential of 1. This parts cleaning product is compatible with stainless steel, copper, iron and aluminum with or without excess water, and has excellent degreasing qualities for most lubes and oils. The chemistry is intended for use in vapor degreasing equipment, cold cleaning, as well as for manual cleaning.*Metalnox M6920 is KYZEN trademark of the Honeywell SolsticeTM Performance Fluid (trans-1-chloro-3,3,3-trifluoropropene) which was determined to be acceptable for cleaning oxygen propulsion systems by NASA. In 2015, NASA announced it had tested Solstice PF, stating it is a âpreferred replacement for cleaning and non-volatile residue (NVR) verification sampling of NASA propulsion oxygen systems hardware, ground support equipment (GSE), and associated test systems.