ARBOthane

[zoidberg]

I've been given 4 'sausage' packs of this industrial mastic - indate. It seems to be used to make some joints waterproof.

Arbothane 1245 is a one-part Polyurethane Sealant which cures on exposure to moisture vapour to form a tough but flexible rubber... ( which ) has good adhesion to concrete and other construction substrates.

Does anyone have any knowledge/experience of using this in a boaty environment, that you'd care to share?