Here's Napier's (London) White Gun Grease... I've never used it though.

www.napierusa.com

VP90 Gun Grease
Gun Grease Tube 25ml (1.05 Oz)

Supplied in a new easy to dispense plastic tube with large non-slip cap. This WHITE grease is highly water resistant (to DIN 51807). VP90 operates effectively in temperatures of -20c to +120c.