This is the link to the Lippert document that describes hydraulic slide maintenance. Page 12 shows the only place they recommend lubricating the slide mechanism.
https://support.lci1.com/documents/h...service-manual
There are other documents on their site for other types of slides. It might take a few seconds for the pdf document to load after clicking the link.
I use the Dicor self leveling sealant for any work on the roof and have never had any issues with it.