mine were leaking (seeping) so I took them apart and cleaned them and noticed a bit of pitting. So I used permated orange (overkill)
http://www.permatex.com/products/pro...t-maker-detail mine don't seap or dripat all and I don't have to over torque the bolts.
picture is 1 year after...but I inspect every year now because they are 17 years old.