Should your counter is attached, you have gravity working against you. You will need to epoxy the kitchen sink and clamp it in position so the epoxy can dried up. The most important part of this process is to let the epoxy dry by least as long as the manufacturer suggests. You can't go wrong by allowing the epoxy dry to get a longer period of time, but you Can get in trouble if you do not let the epoxy set for the at least the proper amount of time. The actual result can be a sink that seems secure, but fails underneath the load of water and dishes. That is not a pretty vision, so be sure to let the epoxy dry. If you handle the sink installation process correctly, you will have accomplished a couple of things. Initially, you will have saved money by simply installing your bar kitchen sink yourself. Secondly, when your guests compliment your bar sink area, you will have the pleasure of knowing, and bragging, that you did it yourself!