Gravity RC has just released their all-new Pure Silicone Diff Putty (GRC420). This is a 100% Polydimethysiloxane fluid, and is recommended as an alternative to commonly used putty in gear differentials or other moving applications. This new extra thick silicone putty is better than conventional putty due to silicone’s ultimate reforming properties. Unlike its sister silicone fluids, it is so thick it can easily be handled with no mess, though the package still comes with an applicator syringe as a bonus.
Source: Gravity RC