Kitchen, Wood Cabinet, Drop In Sink, Cooktops, Pendant Lighting, Refrigerator, and Medium Hardwood Floor As the most common type of kitchen sink, the top-mount sink is installed by inserting the sink into a pre-cut hole in the countertop. The wide rim around the sink supports it on top of the countertop, and is then caulked in place with silicone for a water-tight fit.  Photo 2 of 6 in How to Choose the Right Type of Kitchen Sink from This Home’s High Ceilings Are Responsible for Some Impressive Views