How to Seal Exterior Window Trim to Last

Learn how to seal windows to keep your home protected against rain, snow, drafts and more. Unsealed windows or windows with old, degrading sealant can allow leaks, airflow, pests, and humidity into your home. Caulking and sealing around windows can also help improve your home’s energy efficiency and maybe even lower your cooling and heating bills.

TOOLS & SUPPLIES
For caulking and sealing exterior window trim, or anywhere that could be exposed to water and harsh weather, choose a GE-branded 100% silicone sealant. Both sealants featured in this video are 100% weatherproof, permanently flexible, won’t crack or shrink with temperature changes and offer mold-free product protection*.

Besides a GE-branded 100% silicone sealant, you will also need:
- Caulk gun
- Painter’s tape
- Latex gloves
- Soapy water
- Paper towels
- Still bristle brush
- Utility blade
- Caulk tool
- Mineral spirits
- Isopropyl alcohol

STEP BY STEP INSTRUCTIONS FOR SEALING WINDOWS
Step 1: Start with a Clean Surface (1:14)
Step 2: Carefully Cut the Sealant Cartridge (1:37)
Step 3: Apply Sealant (2:03)
Step 4: Tool the Bead (2:23)
Step 5: Let Sealant Cure Completely (2:36)

Follow GE Sealants on social media for more inspiration:

*Cured sealant is resistant to stain causing mold and mildew. Regular cleaning of the cured sealant is
required, however, as soap and other residue can cause secondary mold and mildew growth.