Where can I get red rubber grease? NOT off the ruddy internet, it?ll cost me more in postage than the grease itself!!

? I?ve never seen it in Halfrauds, are there any other main chains that do it (motor world or whatever)??
I serviced my callipers the other day and needed to remove/bin the dust seals in the end, having some grease in there might be a bonus to stop corrosion and prevent muck directly on main seal i.e. act a bit like the dust seal ...