Hi,

I am trying to find out what type of grease has the best adherence to plastic. I tried using silicon grease on some plastic guide posts but over time gravity and the slight friction action they encounter has caused the silicon grease to slide down the posts. Would white lithium grease or something else stand up better and not slide down as quickly? It's not a temperature issue, it's gravity and slight friction.

Thanks,
rintincop

Depends on the movement, you can use either a Perfluoro poly ehter PFPE grease NLGI 3, that would be loaded with Teflon R and is compatible with plastics. OR you can also use a white assembly paste that are normally compatible with plastics and provide good lubricity even if some oil separates and drops down, the solids in the paste will stay put for longer.