Like was stated above, a JCB dealer should have the stuff. JCB is a heavy equipment mfgr based out of England. They now have a plant in Savanah, Georgia.
We stock it at my work, If you can't find it anywhere, let me know and I can get you some, we have it in a aeresol can and it goes on and dries semi clear with a little bit of a yellow tint to it, the gallon can is black, it can be brushed on or applied with a pressurized spray can or a undercoating type spray gun.
I have done my vehicles with it and am pleased with the product.