Reseal Window [verified]

Resealing a window is an afternoon project that stops drafts, lowers bills, and protects your home. For less than $20 in supplies, you’ll feel the difference immediately.

Using a putty knife or specialized scraper, carefully remove every bit of the old, cracked caulk. Applying new caulk over old caulk is a common mistake that leads to premature failure because the new layer won't bond properly. 2. Clean the Surface

Most sealants require 24 hours to cure fully. Avoid touching the bead or exposing it to heavy rain during this time. Expert Tips for Success

Hold the gun at a 45-degree angle and apply steady pressure to the trigger. Move the gun smoothly along the gap in one continuous motion. It’s better to apply slightly too much than too little. 5. Tool the Joint

Gaps allow rainwater to seep into your walls, potentially causing wood rot, mold growth, and drywall damage.

Choose a 100% silicone or siliconized acrylic latex caulk. Silicone is best for exterior durability, while acrylic is easier to paint over. Caulk Gun: For smooth, consistent application. Putty Knife or 5-in-1 Tool: For removing old sealant. Rubbing Alcohol or Mineral Spirits: To clean the surface. Paper Towels or Rags: For cleanup.

You can find high-quality exterior sealants at retailers like Home Depot or Lowe's. For more professional advice on home maintenance, check out guides on This Old House.

The most critical step for a long-lasting seal is cleanliness. Wipe down the area with rubbing alcohol or a mild detergent to remove dust, grease, and debris. Ensure the area is completely dry before proceeding. 3. Prepare the Caulk Gun

A broken seal is more than just a cosmetic issue. It can lead to several problems that impact both your wallet and your quality of life:

Look for visible cracks in the old caulk, gaps between the frame and the wall, or peeling sealant.