I forget which company uses it, but they apply it to toilet plungers so nothing nasty sticks to it when you remove it from the bowl.
If it's still air breathable ( and I think it is ) then waterproof clothing is about to get really upgraded :D
Put this stuff onto a surface and graffiti is no longer an issue.
Here ya go Donk, this stuff isn't cheap :D
Where can ah get me some of this ?