@Winnie got me worried so i went straight out to check.

Pulled it apart after rushing a bit and stripping one of the little 4mm allen bolts, then having to cut a notch in to get it out. Standard fare.
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Definitely looks and feels like the sticky viscous stuff. Looks like it was seeping out of the edge.
Water pump looks clean and feels fine. Still got the belts on with a bit of tension, but i gave it a good wriggle.
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Finished it back off with some slightly more 'bull at a gate' friendly 5mm allen bolts
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