Hi,
I have a wall which is ordinary bricks topped with a course of black/ blue, shiny ones (I know they have a proper name, but I can't remember it). A couple of the black shiny ones are now loose - the mortar bed that they sit on is still there, they're just no longer stuck to it. Is there some sort of resin-based stuff that I can use to glue things back together (araldite?) rather than having to relay them using sand and cement?
Cheers!
Martin