Black Bear | part number: PARALKETONE-QT BLACK BEAR PAR-AL-KETONE Black Bear Par-Al-Ketone is best known as one of the most rugged corrosion preventives available, performing successfully for over 40 years protecting aircraft components and machine parts in outdoor storage and for export. Black Bear Par-Al-Ketone is a... MSRP: Now: $30.92 Choose Options Black Bear | part number: PARALKETONE-QT BLACK BEAR PAR-AL-KETONE MSRP: Now: $30.92 Choose Options