Yes I know Chris I wouldn't compare the two, IMO I wouldn't seal the roof unless they paid A LOT of money.
I applied it via roller in small sections and then went over with a microfibre cloth to wipe up the excess. Went back tonight to see how it looked after heavy rain and it looks good. Few small areas that have excess on which I'm not to happy with because I went over meticulously wiping up the excess so can't explain it.
It's on a few ridges on the tile, how can I remove these Kev?