Resealing Window Frames May 2026

Tired of high heating bills and that annoying whistle by the window? It’s time to reseal.

Hold the gun at a consistent 45-degree angle. Squeeze the trigger gently and move at a steady pace, pushing the caulk ahead of the nozzle tip. Apply a thin, continuous bead along the entire seam.

Wipe the area with a damp rag and a little soapy water, then let it dry completely. Caulk will not adhere to wet or greasy surfaces.

Use your putty knife to scrape away any loose, peeling, or hardened old caulk. You want a clean, bare surface for the new sealant to stick to. Vacuum out any dust or debris.

Peel off the painter’s tape while the caulk is still wet. Allow the seal to cure for as long as the manufacturer recommends (usually 24 hours) before exposing it to rain or extreme temperatures.

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Cut the nozzle at a 45-degree angle. Start with a small hole—you can always cut more. Puncture the inner seal with a long nail or the built-in poker on most caulk guns.

Wet your finger (or use a smoothing tool) and run it lightly over the bead to press it into the gap and create a concave finish. Wipe excess caulk onto your rag.