Recommended Use: greasing your headset or bottom bracket Dumonde Tech MR Grease unlocks the potential of wheels, headsets, and bottom brackets. Its Micro Resistance Polymer Technology allows it to bond with the bearing-contacting surfaces of these key components, leaving them ultra-slippery and fortified. The result is reduced wear and increased resistance to corrosion. Additionally, MR Grease is safe for carbon fiber, so it won't damage the surfaces of carbon frames, steerer tubes, and cranksets. However, we don't recommend using grease on carbon fiber seatposts, because this may lead to over-tightening of the seatpost clamp.