Fuel gauge check

I am going to install the new sender on Friday, is there any tips before hand I should know. On guy said a bit of grease on the ring, is this common. The instuctions said nothing about sealants.
Do you guy's put anything on the gasket?
Thanks
AL

I agree that a bit of lubricant is in order but not a gasket sealer. Some of the aftermarket gaskets are a joke and are too thin as are the retainers so shop carefully. Watch out for junk made in China!