Seal Cracks & Gaps Around Windows & Doors Fast

If you feel cold air or see small cracks around window or door trim air is leaking through gaps in the seal. Caulks and sealants are designed to close these small openings, stopping drafts, blocking moisture and improving energy efficiency.

This is one of the simplest and most effective ways to stop hidden air leaks.

Even small cracks can add up to major energy loss over time.

Common Signs

• Visible cracks around window or door trim
• Cold air coming through small gaps or joints
• Peeling, cracked or missing old caulk
• Dust buildup along seams or edges

Quick Fix Options

• Interior Caulk: Seals gaps around trim, baseboards and interior window frames
• Exterior Sealant: Blocks air and water around exterior window and door openings
• All-Purpose Sealant: Works for both indoor and outdoor sealing projects

Working with larger gaps? If the gap is too wide for caulk alone, use a backer rod to fill the space first. This helps the caulk adhere properly, improves performance and reduces waste. Shop Backer Rod →

Difficulty: Easy
Time: 15–45 minutes

Choose the right caulk or sealant below based on where the gap is located and get it sealed today.