10 Best Caulk for Window Sealing Tested in 2025

As a seasoned DIYer, I know the frustration of drafts sneaking through tiny gaps around windows. It’s not just about comfort; those drafts are literally money flying out the window in wasted energy. That’s why finding the best caulk for window sealing isn’t just a chore – it’s an investment in your home’s energy efficiency and comfort. I’ve rolled up my sleeves, gone through countless tubes, and put various brands to the test to bring you this comprehensive guide on the top caulk options that truly stand up to the elements and keep your home snug.

IMAGE	PRODUCT NAME	AMAZON LINK
	Gorilla Waterproof Caulk & Seal Silicone Sealant, 10oz…	View on Amazon
	Flex Caulk, Waterproof & Weatherproof Hybrid Polymer…	View on Amazon
	GE Advanced Silicone Caulk for Window & Door, White, 10…	View on Amazon
	Dap 18354 Seal ‘N Peel Removable Caulk, 10.1-Ounce	View on Amazon
	GE Advanced Silicone Caulk for Window & Door, White, 2.8…	View on Amazon
	Gorilla 100% Silicone Caulk, Waterproof Sealant, 2.8oz…	View on Amazon
	GE Supreme Silicone Caulk for Window & Door, Clear, 10…	View on Amazon
	Saker Silicone Caulking Tools-3 in 1 Sealant Finishing Tool…	View on Amazon
	Selsil Siliconized Super Acrylic Latex Sealant, Indoor &…	View on Amazon
	GE Supreme Paintable Silicone Caulk for Window & Door,…	View on Amazon

1. Gorilla Waterproof Caulk & Seal Silicone Sealant, 10oz

When you think “tough,” Gorilla Glue often comes to mind, and their caulk doesn’t disappoint. This 100% silicone sealant is a heavy-hitter for window sealing, designed to withstand the harshest conditions. I’ve used it on exterior windows facing direct weather, and it held up beautifully, sealing out air and water with impressive durability. Its fast water-ready time means you don’t have to stress about unexpected rain showers shortly after application.

Key features that stand out (Bold):
– Speed meets strength: Ready for water exposure in as little as 30 minutes.
– All-purpose: Works indoors and out, in rain or shine after fully cured.
– Waterproof sealant: Seals out air, water, and moisture with 100% silicone as cured.
– Gorilla tough: Mold & mildew resistant, won’t yellow, shrink, or crack over time.

Pros:
– Extremely durable and long-lasting seal.
– Quick rain-ready time is very convenient.
– Resists mold, mildew, shrinking, and cracking effectively.

Cons:
– Can be difficult to clean up if not done immediately.

Best for: Exterior windows needing a robust, long-term waterproof seal.

Expert Opinion: This is my go-to for critical exterior applications where I absolutely can’t afford a failure. Its resilience against weather and mold makes it a reliable choice.

2. Flex Caulk, Waterproof & Weatherproof Hybrid Polymer

Flex Caulk brings a unique approach to window sealing with its innovative packaging and hybrid polymer formula. The “no caulk gun needed” design is a real game-changer for quick fixes or DIY novices. I appreciate the adjustable trigger, which gave me excellent control without the usual struggle of a traditional caulk gun. Its ability to adhere to wet surfaces is also a significant advantage for those less-than-ideal sealing conditions.

Key features that stand out (Bold):
– So easy to use: No caulk gun needed with an adjustable trigger flow nozzle.
– Advanced hybrid polymer formulation: Provides superior adhesion and flexibility.
– Snap & Save cap: Eliminates waste, making it economical for smaller jobs.
– Adheres to virtually any surface, wet or dry.
– Won’t shrink, crack, or become brittle.
– UV and chemical resistant.
– Fully paintable.

Pros:
– Incredibly user-friendly, especially for small projects or beginners.
– Excellent adhesion to a wide range of surfaces, even damp ones.
– Paintable, offering a seamless finish.

Cons:
– The smaller volume per tube might not be cost-effective for large projects.

Best for: Small, quick window sealing projects, or for users who prefer not to use a caulk gun.

Expert Opinion: Its ease of use and unique dispensing make it an approachable option for almost anyone, and the hybrid polymer offers impressive versatility.

3. GE Advanced Silicone Caulk for Window & Door, White, 10oz

GE Advanced Silicone Caulk is a solid choice that balances performance with accessibility. I’ve found it to be consistently reliable for sealing windows, offering a strong, waterproof barrier. The 10-year mold-free product protection is a big plus, especially for windows in humid areas like bathrooms or kitchens. Its flexibility is also notable, accommodating the slight movements windows undergo with temperature changes.

Key features that stand out (Bold):
– 100% Waterproof and Weatherproof: Offers protection against water damage, reliable seal in harsh weather.
– 10-Year Mold-Free Product Protection: Cured sealant resists stain-causing mold and mildew growth.
– Permanently Flexible with Strong Adhesion: 40% more flexibility than Class 25 sealants and 5X stronger adhesion than Silicone 1.
– Durable: Rain-ready in as little as 30 minutes, resistant to shrinking and cracking.
– Compatible with Most Materials: Adheres to metals, woods, aluminum, brick, glass, drywall, ceramic, and more.

Pros:
– Strong, flexible, and waterproof seal.
– Good mold and mildew resistance for long-term cleanliness.
– Quick rain-ready time.

Cons:
– Not paintable, which limits aesthetic options if a perfect color match is desired.

Best for: General window sealing where a durable, waterproof, and mold-resistant seal is a priority and paintability isn’t required.

Expert Opinion: This is a fantastic all-around silicone caulk that delivers on its promises for durability and weather resistance. A solid performer for most window applications.

4. Dap 18354 Seal ‘N Peel Removable Caulk, 10.1-Ounce

Sometimes, you don’t need a permanent seal; you need a temporary solution that’s easy to remove later. That’s where Dap Seal ‘N Peel shines. I’ve used this for seasonal window sealing, like around an old AC unit in the summer or to temporarily seal a drafty window until a more permanent fix can be made. The fact that it peels away easily without damaging painted surfaces is its biggest advantage.

Key features that stand out (Bold):
– Temporary, removable seal: For window frames, door frames, vents, ACs.
– Synthetic rubber formula: Applies like caulk, easily peels away without caulk remover.
– Watertight, weatherproof seal: Dries tack-free in 10 minutes, 12-hour return to service time.
– Multi-season use: Keeps homes warmer in winter, cooler in summer.
– Won’t damage painted surfaces.
– Interior/exterior use (with proper ventilation indoors).

Pros:
– Simple to apply and effortless to remove when no longer needed.
– Provides effective temporary weather sealing.
– Safe for painted surfaces.

Cons:
– Not intended for permanent, long-term sealing.

Best for: Temporary window sealing, seasonal drafts, or sealing around portable air conditioners where future removal is desired.

Expert Opinion: This product fills a niche perfectly. It’s a lifesaver for renters or anyone who needs a flexible, short-term sealing solution that leaves no trace.

5. GE Advanced Silicone Caulk for Window & Door, White, 2.8oz

This is essentially the same excellent GE Advanced Silicone Caulk (reviewed as Product 3), but in a convenient smaller squeeze tube. I find this size incredibly handy for quick touch-ups or small repairs around windows where I don’t want to bother loading a full caulk gun. It’s perfect for sealing a single small gap or fixing a spot of old, cracked caulk without the commitment of a large tube.

Key features that stand out (Bold):
– 100% Waterproof and Weatherproof: Reliable protection against water damage.
– 10-Year Product Protection: Cured sealant resists stain-causing mold and mildew.
– Permanently Flexible with Strong Adhesion: 40% more flexibility and 5X stronger adhesion.
– Durable: Rain-ready in as little as 30 minutes, resistant to shrinking and cracking.
– Compatible with Most Materials: Adheres to a wide range of building materials.

Pros:
– Ideal size for small repairs and touch-ups.
– No caulk gun required, making application very simple.
– Offers the same high performance as its larger counterpart.

Cons:
– Less cost-effective for larger jobs requiring multiple tubes.

Best for: Small window sealing repairs, touch-ups, or minor drafts where a full caulk gun isn’t practical.

Expert Opinion: Don’t underestimate the utility of these smaller tubes. They’re excellent for targeting specific problem areas or for those without a caulk gun.

6. Gorilla 100% Silicone Caulk, Waterproof Sealant, 2.8oz

Just like its 10oz sibling, this 2.8oz Gorilla 100% Silicone Caulk offers incredible strength and waterproof performance, but in a much more manageable squeeze tube. I keep a few of these around for unexpected gaps or when I need to quickly seal a window trim. It brings all the reliability of the Gorilla brand – its mold resistance and guarantee against yellowing or cracking – to a format that’s super easy to work with for minor fixes.

Key features that stand out (Bold):
– Waterproof sealant: Seals out air, water, and moisture with 100% silicone as cured.
– Speed meets strength: Ready for water exposure in as little as 30 minutes.
– All-purpose: Works wherever the work is; Indoor and out, rain or shine.
– Gorilla tough: 10-year mold & mildew resistant, won’t yellow, shrink or crack over time.
– Use on: Windows, doors, stainless steel, countertops, laminate, porcelain, and more.

Pros:
– Exceptional waterproof and weather-resistant properties.
– Convenient small size for small jobs and quick fixes.
– Resists mold, mildew, and degradation over time.

Cons:
– Small quantity can be expensive for larger or multiple window projects.

Best for: Quick, robust, and permanent small window sealing fixes, or for sealing around fixtures near windows.

Expert Opinion: This is the compact powerhouse of silicone caulks. Great to have on hand for emergency seals or detailed work where precision matters.

7. GE Supreme Silicone Caulk for Window & Door, Clear, 10oz

Stepping up from the “Advanced” line, GE Supreme Silicone Caulk offers lifetime product protection and even stronger adhesion, making it an elite choice for window sealing. I opted for the clear version on windows where I wanted the caulk to be virtually invisible against various frame colors or glass. Its superior flexibility and resistance to extreme temperature fluctuations give me confidence that it will hold up for years, even decades.

Key features that stand out (Bold):
– 100% Waterproof and Weatherproof: Superior protection from water damage.
– Lifetime Product Protection: Cured sealant is resistant to stain-causing mold and mildew growth.
– Permanently Flexible with Strong Adhesion: 40% more flexibility and 7X stronger adhesion than Silicone 1.
– Shrink and Crack Proof: Withstands extreme expansion and contraction.
– Compatible with Most Materials: Adheres to metals, woods, aluminum, composites, brick, stone, glass, and more.

Pros:
– Unmatched durability and longevity with lifetime mold protection.
– Extremely flexible to accommodate movement.
– Clear finish is ideal for seamless integration.

Cons:
– Higher price point than other silicone options.

Best for: Premium, long-lasting window seals where maximum flexibility, adhesion, and an invisible finish are desired.

Expert Opinion: If you want the absolute best performance and peace of mind for decades, this Supreme line is worth the investment, especially the clear variant for a clean look.

8. Saker Silicone Caulking Tools-3 in 1 Sealant Finishing Tool

While not a caulk itself, the Saker 3-in-1 Caulking Tool is an indispensable companion for achieving a professional finish when applying the best caulk for window sealing. I used this tool extensively during my window sealing projects, and it made a world of difference. The ability to both remove old caulk and smooth new beads with a single tool dramatically improved the quality and speed of my work, saving me from messy fingers and uneven lines.

Key features that stand out (Bold):
– Professional Design: Combines 3 functions into 1 (internal angle scraper, flat angle scraper, silicone smoother).
– Durable Material: Sharp, hard stainless steel blade for old caulk; nice silicone trowel for smoothing.
– Effectiveness: Easy to rip old caulk and smooth new caulk well. No need for masking tape.
– Multiple Usage Scenarios: Great for home, kitchen, bathroom, floor, tank, window, sink joint, and more.

Pros:
– Significantly improves the neatness and professionalism of caulk lines.
– Makes removing old caulk much easier and cleaner.
– Reduces the need for masking tape and multiple tools.

Cons:
– The plastic end can wear on very rigid surfaces.

Best for: Anyone applying caulk, from DIYers to professionals, who wants clean, smooth, and consistent caulk beads.

Expert Opinion: Don’t skimp on the tools! This Saker tool will elevate your caulking game, ensuring your effort in choosing the best caulk for window sealing results in a beautiful, effective seal.

9. Selsil Siliconized Super Acrylic Latex Sealant, Indoor & Outdoor

Selsil Siliconized Super Acrylic Latex Sealant offers a fantastic middle ground between pure acrylic latex and pure silicone. I found it incredibly versatile for both indoor and outdoor window sealing. Its enhanced strength and flexibility, thanks to the silicone emulsion, make it more durable than standard painter’s caulk, and the fact that it’s paintable is a major advantage for blending it seamlessly with your window frames and walls.

Key features that stand out (Bold):
– ENHANCED STRENGTH & FLEXIBILITY: Reinforced with silicone emulsion for enhanced strength and flexibility.
– PAINTABLE & AESTHETIC: Once fully dry, can be painted over to match desired color scheme.
– WEATHER & MOISTURE RESISTANT: Provides reliable protection against water, wind, and moisture.
– VERSATILE USAGE: Suitable for aluminum, wood, PVC frames, windows, porous surfaces (brick, concrete).
– EASY APPLICATION & CLEANUP: Applies easily, cleans up with water before curing. Offers bubble-free curing.

Pros:
– Excellent balance of flexibility and durability for an acrylic latex.
– Fully paintable, allowing for perfect color matching.
– Easy water cleanup before curing.

Cons:
– Not as purely waterproof or flexible as 100% silicone in extreme conditions.

Best for: Interior and exterior window sealing where paintability is essential, offering better durability than standard acrylic caulk.

Expert Opinion: For projects where you need a paintable caulk that still delivers good weather resistance and flexibility, this Selsil product is a smart choice.

10. GE Supreme Paintable Silicone Caulk for Window & Door, White, 10oz

Finally, the GE Supreme Paintable Silicone Caulk brings the best of both worlds: the superior performance of GE’s Supreme silicone line with the added benefit of being paintable. I know how frustrating it is when you want silicone’s durability but also need to match your trim color. This caulk solves that problem beautifully. It delivers that 7X stronger adhesion and permanent flexibility, ensuring a long-lasting, customizable seal for your windows.

Key features that stand out (Bold):
– 100% Waterproof and Weatherproof: Robust protection from water damage.
– Permanently Flexible with Strong Adhesion: 40% more flexibility and 7X stronger adhesion than Silicone 1.
– Shrink- and Crack-Proof: Withstands extreme expansion and contraction.
– Paintable: Sealant easily fits in with your home’s surroundings.
– Compatible with Most Materials: Adheres to most metals, woods, aluminum, brick, glass, and more.

Pros:
– Combines the superior durability and flexibility of silicone with paintability.
– Excellent adhesion and resistance to shrinking/cracking.
– Ideal for a seamless finish that matches any decor.

Cons:
– Cleanup requires mineral spirits or specialized silicone removers if not done immediately.

Best for: Window sealing projects where you need the highest level of silicone performance but absolutely require a paintable finish.

Expert Opinion: This is a top-tier product for discerning DIYers who refuse to compromise on either performance or aesthetics. The ultimate solution for a durable, customized window seal.

Helpful Comparison Short Insights

When choosing the best caulk for window sealing, consider a few key factors. For maximum waterproofing and flexibility, especially on exterior windows, 100% silicone options like Gorilla Waterproof Caulk & Seal or GE Supreme Silicone are hard to beat. They offer excellent adhesion and resistance to mold, mildew, and extreme weather. However, remember that pure silicone is generally not paintable, which can be a drawback for aesthetic reasons.

If paintability is a must-have, then the Selsil Siliconized Super Acrylic Latex Sealant or the GE Supreme Paintable Silicone Caulk are your best bets. The Selsil offers easy water cleanup and good performance for its class, while the GE Supreme Paintable provides the robust durability of silicone with the convenience of being able to paint over it for a perfect match.

For small repairs or quick fixes, the 2.8oz squeeze tubes from Gorilla and GE Advanced are incredibly convenient, eliminating the need for a caulk gun. They’re perfect for tackling a few drafts without a big commitment. And if you’re dealing with seasonal needs or temporary seals, the Dap Seal ‘N Peel Removable Caulk is a unique and invaluable product that peels away without a trace.

Lastly, no matter which caulk you choose, achieving a professional look often depends on your tools. The Saker Silicone Caulking Tools are an excellent investment, making the application of any caulk much smoother, cleaner, and more efficient. It really helps to create a perfect seal around your windows.

Final Verdict

Choosing the best caulk for window sealing really boils down to your specific needs.

• For the ultimate in long-term, weather-defying performance and durability (especially outdoors): You can’t go wrong with the Gorilla Waterproof Caulk & Seal Silicone Sealant or the GE Supreme Silicone Caulk (Clear). These are set-it-and-forget-it solutions.
• If you need a paintable finish without sacrificing too much performance: The GE Supreme Paintable Silicone Caulk is your premium choice, offering silicone’s benefits with aesthetic flexibility. For a good balance of paintability and cost-effectiveness, the Selsil Siliconized Super Acrylic Latex Sealant is a strong contender.
• For quick, easy applications or those without a caulk gun: The Flex Caulk is a standout, providing convenience with a strong hybrid seal.
• When temporary sealing is the goal: The Dap Seal ‘N Peel Removable Caulk is an ingenious solution that saves you future headaches.
• And don’t forget the indispensable companion: The Saker Silicone Caulking Tools will elevate your caulking game, ensuring a pristine finish with any of these excellent caulks.

No matter your project, there’s a reliable caulk on this list to help you seal those windows and make your home more comfortable and energy-efficient.

Comprehensive FAQ Section

Q1: What is the best caulk for window sealing to stop drafts?
A1: For stopping drafts, a high-quality 100% silicone caulk like Gorilla Waterproof Caulk & Seal Silicone Sealant or GE Supreme Silicone Caulk is generally considered the best. These offer excellent flexibility and adhesion, creating a durable, airtight, and watertight seal that effectively prevents air leakage.

Q2: Silicone vs. Acrylic Latex: Which is better for windows?
A2: 100% silicone caulk is superior for windows, especially exterior ones. It offers greater flexibility, remains permanently waterproof, and holds up better against extreme weather, UV radiation, and temperature fluctuations. Acrylic latex (or siliconized acrylic latex) is paintable and easier to clean up but is less flexible, less durable, and not as resistant to moisture long-term as pure silicone. If paintability is critical, a paintable silicone caulk is the best compromise.

Q3: How long does window caulk last?
A3: The lifespan of window caulk varies depending on the type and exposure. High-quality 100% silicone caulks typically last 20-50 years, with some like GE Supreme offering lifetime durability. Acrylic latex caulks usually last 5-15 years. Factors like direct sunlight, temperature extremes, and proper application can impact longevity. Regularly inspecting your window seals for cracks or deterioration is good practice.

Q4: Can I paint over silicone caulk?
A4: Traditional 100% silicone caulk is NOT paintable because paint doesn’t adhere to its non-porous surface. However, there are now specialized paintable silicone caulks, like the GE Supreme Paintable Silicone, and siliconized acrylic latex caulks (like Selsil) that are designed to accept paint. Always check the product label if paintability is a requirement for your window sealing project.

Q5: How do I remove old caulk from windows?
A5: Removing old caulk is crucial for a good new seal. You’ll need a utility knife or a specialized caulk removal tool (like the scraper on the Saker Silicone Caulking Tools). Carefully cut along both edges of the old caulk bead and then pry it out. For stubborn silicone, a chemical caulk remover might be necessary. After removal, clean the surface thoroughly to ensure it’s free of debris and old caulk residue before applying the new best caulk for window sealing.

Q6: What tools do I need to caulk windows effectively?
A6: To caulk windows effectively, you’ll need:
* A caulk gun (unless using a squeeze tube like Flex Caulk or smaller Gorilla/GE Advanced options).
* A utility knife or caulk remover tool (like the Saker Silicone Caulking Tools) for old caulk and opening new tubes.
* A caulk finishing tool or your finger (wearing gloves) for smoothing the caulk bead.
* Clean rags and mineral spirits (for silicone cleanup) or water (for acrylic latex cleanup).
* Masking tape (optional, for cleaner lines).

Q7: Why is my window caulk cracking shortly after application?
A7: Caulk cracking can be due to several reasons:
* Improper surface preparation: Not cleaning the surface thoroughly before application.
* Applying too thin a bead: Caulk needs sufficient material to flex.
* Using the wrong type of caulk: Acrylic latex caulk might crack if applied in areas needing high flexibility (like around windows that expand/contract a lot). Silicone caulk is more flexible.
* Poor quality caulk: Cheap caulk may not have the necessary elasticity.
* Movement of the substrate: If the window frame or surrounding material moves too much, even good caulk can eventually fail.

Ensuring you use the best caulk for window sealing for your specific conditions and apply it correctly will minimize cracking.