Have found Ali seat posts in steel frames that other have used normal grease in the past and are now siezed but not had an issue when when I've used aluslip.
Because I never saw the problem I didn’t look deeper into a solution. I live in a drier climate than the UK and likely dodged that bullet partly because of that, partly because my bikes are stored indoors.
Have found Ali seat posts in steel frames that other have used normal grease in the past and are now siezed but not had an issue when when I've used aluslip.