Hi. Yes I was trying rubber grease which seemed to stop the rubber seals from deteriorating so quickly. I have however found that my keel seals have perished – and I am not convinced that they have actually lasted long enough to make special grease worth while.
If you want to try to find this – you will need to search for “rubber grease” – it is usually used on car brake components – because it does not damage the hydraulic seals. You can find in in conventional size tubs – and I got mine via ebay.
On the other hand you might be satisfied to use whatever grease you fancy – or can get locally. I dont know if anyone elase has strong views on this?