Quicksilver Gun Lube Mercury Quicksilver Grease Gun with 3oz. tube of Mercury 2-4-C Marine Grease with PTFE. The Mercury 2-4-C Marine Grease is a high quality multi-purpose lubricant to withstand extreme friction and also providing added water resistance. Features Handy, take along lube gun with 3 oz. 2-4-C Lube cartridge 24C Marine Grease with PTFE is a high quality, extremely versatile lithiumbased, NLGI 2 grease that wont break down when mixed with water. Prevents rust and corrosion Californ