Flex Seal - UK equivalent?

[Rory]

I'm trying to track down a UK equivalent of the Flex Seal 'liquid rubber' aerosol spray. The product will be used to replace the waterproof coating underneath the lid/top flap of a medium ALICE pack, as this is now doing the classic 'perish and peel'.
Would anyone know of a good alternative that will bond with nylon, be flexible and waterproof?

 

[Freeforester]

Grangers used to do a 'plastic paint' iirc, very strong smelling stuff, not too sure if they still do, or if it may have been another firm - the fumes will do that to ye!

Edit, there might be something suitable here:

Interior Liquid Plastic Paint Soft Leather/Vinyl Coat - BLACK (1L)

Interior Liquid Plastic Paint Soft Leather/Vinyl Coat - BLACK (1L) from Frost.co.uk - The Specialist of High Quality Tools & Equipment for the Classic Vehicle Restorer

www.frost.co.uk