ops

[using water]

think I over did it with the waterproof spray!
Did a sample patch lovely no change of colour
So sprayed the whole lot on went for a cupper
Came back and it's now white !
But don't leak anymore

Moral of story. Get a small tin

[tvrbob]

Spray on waterproofing doesn't work; it just sits on the surface and comes off after a few washes.

Try this method if you want to do a proper job.

Full waterproofing method

[daz the plumber]

i got that stuff from the camping shop works a treat .