Magnalube-G PTFE Grease deposits a fine, protective and lubricating film on metal parts. It is virtually unaffected by rust and corrosion and will not migrate from hot surfaces. Magnalube-G PTFE grease is water resistant, stable at high temperatures, resistant to oil separation, and is chemically and mechanically stable.
Z TRAPEZOIDAL LEADSCREW
Once every half year the Z trapezoidal leadscrew has to be lubricated with Magnalube. This is the green grease that was delivered with your Ultimaker 2. Make sure to spread 10 drops of grease over the entire threaded rod. With your next print the Ultimaker 2 will lubricate the axis itself by moving up and down.
￼Note: Magnalube should be applied to the Z trapezoidal leadscrew ONLY; make sure to not put it on any of the other axes.
Read more about lubricating your Ultimaker 3D Printer here