Hi All, I am a landscaper by trade and have done some very minor tiling. For my current job, I have gotten some silver Anthracite split face tiles. They will be used as cladding on the block walls. The supplier I got them from said that they are internal use. They say that they should not be used on anything that may get wet, i.e. a shower. I assume this is because there is not grout and they could allow water to pass in between them that would get to the wall beneath. I'm not worried about the wall beneath as it is just concrete blocks. Do you think I will have any problems using these? I have used similar slate tiles before without any issues. I appreciate any help on this that you could give me. Thank you in advance. TB