CRC CO Contact Cleaner is a plastic-safe general-purpose evaporating cleaner and degreaser for use on sensitive electronic and electrical equipment. It is formulated to quickly penetrate into hard-to-reach areas and effectively flush away carbon deposits, dirt, light oils, dust, lint and other light contaminants. CRC CO Contact Cleaner as part of a regular maintenance programme will eliminate carbon deposits and other contaminants that hold moisture and cause corrosion or arcing. An increase in resistance will indicate the frequency of re-application. Use on de-energised equipment only.