Arbosil 1096

[Simpo Two]

I've been told the is the best stuff for sealing a boat hatch (the factory use Arborsil 1096 but not in the right cartridges). It's not a DIY product; I can get it mail order by next Tuesday but was hoping to get started at the weekend. Anyone got any ideas where I might find a tube of it in black please? It needs to be flexible and 100% weather/watertight - rain on my walnut table is not an option!

[Simpo Two]

That's good news - I'd been doing some other research and that was pointing to 791 as well, so thanks very much for the corroboration. And better still, Screwfix sell it!