Best Exterior Window Sealant

Exterior window leaks and drafts can cause costly water damage and discomfort inside your home. Using a high-quality silicone caulk is a proven way to create a long-lasting, weatherproof barrier that keeps moisture and air out.

GE Advanced Silicone Clear Caulk stands out for its robust waterproofing and flexibility, making it a strong choice for homeowners facing challenging weather conditions. It's especially well-suited for areas exposed to heavy rain or fluctuating temperatures.

• 100% silicone formula provides a fully waterproof and weatherproof seal for reliable protection
• Permanently flexible with 40% more flexibility than standard Class 25 sealants, reducing risk of cracks
• Wide material compatibility adheres to metals, woods, masonry, glass, and more for versatile application

Compared to typical acrylic or latex caulks, this product prioritizes maximum waterproofing and long-term durability. The main tradeoff is that it is not paintable, so it works best where a clear finish is acceptable.

Painting over caulk is often necessary for a seamless exterior finish, but many waterproof sealants can't be painted. A hybrid caulk like this one solves that problem, allowing you to match your window trim perfectly while still sealing out moisture.

Flex Seal Flex Caulk Paintable Hybrid Sealant is ideal for DIYers who want a paintable, easy-application solution. Its advanced hybrid polymer formula is designed for convenience and broad surface compatibility, making it a practical pick for quick touch-ups or full window projects.

• Paintable hybrid polymer lets you finish with any color for a cohesive look
• No caulk gun needed thanks to the adjustable trigger flow nozzle, simplifying application
• Adheres to wet or dry surfaces for flexible use in various conditions

Unlike pure silicone caulks, this product prioritizes paintability and ease of use. The tradeoff is that it may not offer the same extreme durability as 100% silicone options in the harshest environments.

Sealing windows in extreme temperatures can be challenging, as many caulks lose effectiveness outside moderate ranges. A specialized all-weather sealant ensures reliable results whether you're working in the heat of summer or the chill of winter.

DAP AMP All Weather Window Sealant Clear is formulated for application from 0 to 140 degrees Fahrenheit, making it a standout for year-round projects. It's a smart choice for homeowners or pros who need flexibility in scheduling and reliable adhesion in tough conditions.

• Wide temperature range allows application from 0°F to 140°F for all-season use
• Paintable in 30 minutes for faster project completion and color matching
• Wet surface application means you can seal even if conditions aren't perfectly dry

Compared to standard caulks, this product prioritizes versatility in weather and surface conditions. The main tradeoff is that it may not be as specialized for mold resistance as some other options.

Keeping exterior window joints looking clean and free from dirt buildup is a common challenge. A sealant that resists water absorption and dirt pickup helps maintain a neat appearance over time.

DAP Dynaflex Ultra Advanced Exterior Sealant in light gray is designed for homeowners who value both weatherproofing and a tidy finish. Its Weather Max Technology and hydrophobic surface make it a strong choice for visible window and trim areas.

• Hydrophobic surface prevents water absorption and resists dirt for a clean look
• Dries tack-free in 30 minutes and is paint/rain-ready in 1 hour for quick results
• Seals joints up to 1" wide with strong multi-material adhesion

Compared to basic caulks, this product emphasizes appearance and easy maintenance. The tradeoff is that it is available in light gray only, which may not suit all color schemes.

When time is of the essence, waiting for caulk to cure before painting can slow down exterior window projects. A fast-curing, paintable silicone caulk streamlines the process without sacrificing protection.

GE Supreme Paintable Silicone Caulk White is a strong pick for those who need to paint soon after sealing. Its hybrid performance combines the waterproofing of silicone with the paintability of acrylic latex, making it ideal for busy schedules and dynamic environments.

• Paint and water ready in 30 minutes for efficient project turnaround
• Hybrid silicone-acrylic formula offers flexibility and strong adhesion
• Low odor, neutral cure allows for comfortable indoor or outdoor use

Compared to traditional silicone caulks, this product prioritizes speed and paintability. The tradeoff is that it is available only in white, which may not match all trim colors.

Mold and mildew can quickly develop around windows exposed to moisture, leading to unsightly stains and potential health issues. A caulk with strong mold resistance is essential for humid climates or shaded areas.

Gorilla Waterproof Silicone Caulk White is formulated to resist mold and mildew growth, making it an excellent choice for bathrooms, kitchens, or any exterior window prone to dampness. Its durability and non-yellowing properties ensure a clean, lasting seal.

• Mold and mildew resistant to help prevent staining and deterioration
• Ready for water exposure in 30 minutes for fast protection
• Won't yellow, shrink, or crack for long-term reliability

Compared to general-purpose caulks, this product is specialized for environments where mold is a concern. The tradeoff is that it is not paintable, so it works best where a white finish is acceptable.

Sealing multiple windows or larger frames requires a caulk that comes in a generous size and maintains performance across a variety of surfaces. A 10 oz cartridge offers more coverage for bigger projects.

GE Advanced Silicone Caulk Clear 10 oz is a practical choice for homeowners tackling several windows or doors at once. Its strong waterproofing and flexibility make it suitable for demanding exterior applications.

• Large 10 oz cartridge provides ample product for multiple windows
• 100% waterproof and weatherproof for reliable, long-term sealing
• Low odor, neutral cure for comfortable application indoors or out

Compared to smaller tubes, this product prioritizes coverage and efficiency. The tradeoff is that it is not paintable, so it works best for clear, unobtrusive seals.

Unexpected rain can ruin freshly applied caulk, leading to wasted time and materials. A sealant that's rain-ready the same day provides peace of mind and flexibility for outdoor projects.

GE All Purpose Silicone Caulk Clear is designed for homeowners who need a reliable sealant that can withstand rain exposure in as little as 12 hours. Its strong adhesion and flexibility make it suitable for a wide range of materials and conditions.

• Rain-ready in 12 hours for quick project turnaround
• Flexible and durable to handle temperature changes and movement
• Adheres to most materials including glass, wood, stone, and more

Compared to slower-curing caulks, this product prioritizes speed and versatility. The tradeoff is that it is not paintable, so it is best used where a clear finish is acceptable.