It is known as a hybrid caulk because it combines solvent- and water-based components. Not ideal, but arguably better than 100% silicone. You could also use polyurethane caulk. While strictly ...

Designed to seal shingles, gutters, chimneys, skylights, and ducts, this polyurethane exterior caulk is an ideal option for fixing these roof issues. The 10.1-ounce tube of exterior caulk’s ...