"S S" wrote in message
...
I have a flat roof with floor tiles (sunroof) Whats best way to seal them,
I dont want the expense of retiling. As yet there are no leaks but would
like to seal as a precaution.

Floor tiles?

As the other poster said, tile roofs only protect the tar-paper membrane
underneath them. Some folks seal roof tiles to keep them from molding, but
not prevent leaks.