You’ve felt it. That mysterious shiver while sitting on the couch. The way the curtains puff inward on a windy day. The sudden spike on your heating bill that makes you double-check the thermostat.
Snip the caulk tube nozzle at a 45-degree angle. You want a bead the size of a pencil lead, not a garden hose. Poke the inner seal with the wire on the gun. seal cracks around windows
The culprit isn't your furnace or your insulation—it’s the invisible gaps around your windows. You’ve felt it
Remove old, cracked caulk using a 5-in-1 tool or a stiff putty knife. Vacuum out dust and dirt. Wipe the area with rubbing alcohol—you need a pristine surface. The sudden spike on your heating bill that
Wet your finger (or a plastic spoon) with soapy water. Run it lightly over the bead to push the caulk into the crack and smooth the surface.