When we come and install your countertop we will also mount your sink for you. It is always good to give the adhesive around the sink at least three hours (24 is ideal) before any plumbing work is preformed. If you are adding or reattaching a garbage disposal it is important to wait the 24hrs since it will apply a lot more weight to the sink area. Remember we are not licensed plumbers so you should make sure you have a plumber lined up to connect the plumbing unless you are planning on doing it yourself.