This sounds the one for your needs:

http://www.wickes.co.uk/invt/240148



On Oct 18, 8:08 pm, "beamoocher" wrote:
Hi all. I have a leaky flat roof, but even a roofer has said it doesn't
need replacing so I thought I would seal any cracks and go over it with
a bitumen type paint. Anyone know what might be best? E.g. Wickes have
a solvent based one and a water based one for about the same price.
Many Thanks.