What's It Made Of, Exactly? A Guide to Caulk Formulations

Let's be honest: most people grab whatever tube is closest on the shelf and hope for the best. We've all been there. But if you've ever watched a bead of caulk fail six months after you applied it — bubbling up, cracking, peeling away like a bad decision — you know there's more to caulk than meets the eye.

Here's the thing: caulk chemistry matters.