Siding is an important part of your home’s defense against external elements, so you must spare no expense when it comes to reinforcing and maintaining it. Siding caulk is one of the things you should also carefully consider as applying it onto surfaces willy-nilly might do more harm than good. There are many kinds of caulk, and many different factors to consider. What is siding caulk? What should you keep in mind about siding caulk?