Caulking inside corners and along trim is no problem. But sealing long outside corners is another matter. Today you'll learn how pros keep outside corner goo running straight and true. When sealing outside corners, pros keep caulk tubes running straight and true by cutting a V notch in the plastic tip. It then acts as a running guide that slides along the corner, keeping the tube centered over the crack for a nice long, smooth bead of caulk without the slips, drips and skips that look messy and can lead to future leaks. Want to do your outside corners like a real pro? Just V-notch a tube and set it aside. When it's time to perform, just let it glide. Caulking straight and true is easy to do. And that's the On The House tip for today.