sealing tiles used externally

[BazzaS]

I've used a job-lot off tile offcuts to create a "gaudi" mosaic effect on part of my garden wall. The tiles are a mixture of types, the cement and grout is proper external grade. I now think I should seal/weatherproof the wall - BUT I can't find any obvious external sealer. So can anyone please advise me what sort of sealer to use. The wall is south facing so will get a lot of direct sunlight.

Thanks in advance
Bazza

 

[david campbell]

LTP do a sealer for previosly laid tiles and it also enhances them