A cooktop is a flat heating surface that is installed on top of a counter or island, and comes in gas and electric models. They differ from traditional stoves in that they do not have an oven. Since a cooktop drops into a countertop, you sometimes must apply a bead of caulk around the perimeter of it to seal it in place. In addition to sealing the cooktop, the caulk improves the appearance of the installation.
Install a clear, ceramic caulk tube into a caulk gun by pulling back on the rear portion of the gun and sliding the tube into the gun. Cut 1/4 inch off of the tip off the caulk tube nozzle using scissors and making the cut at a 45-degree angle.
Hold a clean cloth under warm running water until it is saturated and then wring it out as tightly as possible. Wipe the entire perimeter of the cooktop to remove dirt, dust and grease, which can interfere with the adhesion of the caulk.
Place the tip of the caulk tube at one corner of the cooktop where it meets the countertop. Raise the back end of the caulk gun up until it is at a 45-degree angle with the counter.
Press the trigger on the caulk gun slowly until you see a narrow bead of caulk emerge from the tube. Move the tube along the edge of the cooktop using a slow, steady motion while continuing to press the trigger on the caulk gun.
Continue until you reach the end of the cooktop and then apply caulk to each of the remaining three sides in the same manner.
Place a caulk smoother tool at one corner of the cooktop and press down firmly. Pull the tool along the entire edge of the cooktop to smooth the caulk into a professional-looking appearance. Wipe the tool periodically on a paper towel to remove the excess caulk buildup. Repeat the process on the other three sides of the cooktop.
Allow the caulk to cure for the amount of time indicated on the tube before using the cooktop.