What are the best practices for using plumbers putty or silicone when installing a new sink?

When installing a new sink, it is best to use plumber's putty for sealing around the drain and silicone for sealing around the edges of the sink. Apply a thin, even layer of plumber's putty to the drain flange before installing it, and use silicone to create a watertight seal between the sink and the countertop. Be sure to follow the manufacturer's instructions for both products to ensure a proper installation.