Step 6 · Mount and Support the Sink

This is the step most people slow down on. Take it one move at a time — there’s no rush, and you can rewind the clip as many times as you need.

Now it's time to mount the sink. First, apply a continuous, generous bead (about 3/8-inch thick) of 100% silicone sealant to the top rim of the new sink. With a helper, carefully lift the sink into the cabinet and press it firmly up against the underside of the countertop. Ensure it is centered correctly in the opening. To hold it in place while the silicone cures and you attach the clips, use a support system. The most common method is to place a 2x4 board across the top of the sink opening on the countertop, and use one or two bar clamps running through the drain hole(s) up to the board to pull the sink up snugly against the counter. Do not overtighten, as this could damage the sink or counter.