Off topic a bit, but it's still regarding sink. House just finish reno, sink (topmount type) just installed undermount style on concrete countertop with tiles. However, got leaking problem, water will seep through the connection between sink and tile/concrete countertop. Called the wet works contractor, he came and just applied 1 layer of glue around the sink perimeter (connected to the tiles). But said problem will occur again one...how come like that? How to make sure that it won't leak again and again in the future? Anyone can help advice?

Umm...how deep the sink need to be? The sink leaking at 1 side, water will drip down from there. Izit the sink need to attach to any glue first before they cement/join to the tiles? Mine not sure how the contractor did, coz was not around to watch when he installed the sink and tile it up...