Tuckpointing pool coping-Question
Most of the brick I've fixed on pool coping hasn't failed from the chemicals of the water, but from "sloppy", loose filling of the joints. Most of them that I've worked on were set in the bedding material (usually mortar) and filled with a bag afterward, but were never pushed completely tight. If you consolidate the Type N mud with a filler/tuckpointing trowel, I think you'll be fine. Banding agent certainly won't hurt either. Also, don't forget to treat the control joints in the surrounding slab (only assuming the brick are bearing partially on the slab) as control joints where they intersect the brick..........