previous arrow
next arrow

Which Silicone Is Best for Windows?


Choosing the right silicone for your windows is crucial for ensuring a durable and weatherproof seal. With so many options available, it can be challenging to determine which silicone product is best suited for your needs. This article will guide you through the different types of silicone, key features to look for, top brands, application tips, and much more. By the end, you’ll have a clear understanding of which silicone is best for your windows.

Types of Silicone for Windows

General Purpose Silicone

General-purpose silicone is versatile and can be used for various sealing applications. It’s often cheaper but may not offer the specialized properties required for window sealing.

Window and Door Silicone

Specifically formulated for windows and doors, this type of silicone provides superior adhesion and flexibility. It’s designed to withstand the elements and maintain a strong seal over time.

High-Temperature Silicone

High-temperature silicone is ideal for areas exposed to extreme heat. While not commonly used for standard windows, it’s perfect for situations where high thermal resistance is necessary.

Key Features to Look For


You want a silicone that can stand the test of time. Durability ensures that the seal remains intact, preventing leaks and drafts.


Windows expand and contract with temperature changes. Flexible silicone accommodates this movement without cracking.

Weather Resistance

A good window silicone must withstand rain, UV rays, and temperature fluctuations. Weather-resistant silicone ensures your windows remain sealed in all conditions.

Adhesion Properties

Strong adhesion is critical for a lasting seal. Look for silicone that adheres well to both glass and frame materials.

Top Brands in the Market

GE Silicone

GE Silicone is known for its high-quality products that offer excellent durability and weather resistance. It’s a popular choice among professionals.

DAP Silicone

DAP provides a range of silicones tailored for different applications, including windows and doors. Their products are known for ease of application and reliable performance.

Gorilla Silicone

Gorilla Silicone is famed for its strength and versatility. It’s an excellent option for those looking for a robust and flexible seal.

Loctite Silicone

Loctite offers premium silicone solutions that ensure a long-lasting seal. Their products are particularly noted for their adhesion and flexibility.

Comparative Analysis

GE Silicone vs. DAP Silicone

GE Silicone often edges out DAP in terms of weather resistance and longevity. However, DAP is more user-friendly, making it a favorite for DIY projects.

Gorilla Silicone vs. Loctite Silicone

Gorilla Silicone stands out for its strength, while Loctite is praised for its superior adhesion and flexibility. Both are excellent choices, depending on your specific needs.

Application Tips

Surface Preparation

Clean the surface thoroughly to remove dirt, dust, and old sealant. A clean surface ensures better adhesion.

Application Techniques

Cut the nozzle at a 45-degree angle for better control. Apply the silicone in a steady, continuous bead for an even seal.

Curing Time

Allow sufficient curing time, typically 24 hours, to ensure the silicone sets properly. Avoid disturbing the seal during this period.

Common Mistakes to Avoid

Not Cleaning the Surface Properly

Skipping surface preparation can lead to poor adhesion and premature failure of the seal.

Using the Wrong Type of Silicone

Ensure you’re using silicone specifically designed for windows. General-purpose silicones may not provide the necessary durability and weather resistance.

Ignoring Curing Time

Rushing the curing process can compromise the integrity of the seal. Be patient and allow the silicone to cure fully.

Maintenance and Longevity

Regular Inspection

Check your windows regularly for signs of wear or damage. Early detection allows for timely repairs.

Repairing Small Cracks

Address small cracks or gaps immediately to prevent them from expanding. Use a high-quality silicone for repairs.

Reapplying Silicone

Over time, silicone can degrade. Reapply as needed to maintain a strong, weatherproof seal.

Environmental Considerations

Eco-Friendly Options

Some silicones are formulated with environmentally friendly ingredients. Look for products labeled as eco-friendly if this is a priority for you.

Safe Disposal Methods

Dispose of old silicone and empty cartridges according to local regulations to minimize environmental impact.

Cost Considerations

Price Range of Different Brands

Silicone prices vary widely. High-end brands like GE and Loctite are more expensive but offer superior performance. Budget options like DAP provide good value for money.

Cost vs. Longevity Analysis

Investing in a high-quality silicone can save money in the long run by reducing the frequency of repairs and reapplications.

Case Studies

Residential Applications

Homeowners often prefer DAP for its ease of use and reliable performance in residential settings.

Commercial Applications

GE Silicone is frequently chosen for commercial projects due to its superior weather resistance and durability.

Expert Opinions

Insights from Professional Installers

Professional installers often recommend GE Silicone for its all-around performance and longevity. They highlight its excellent adhesion and weather resistance.

Manufacturer Recommendations

Manufacturers typically suggest using silicone that matches the specific requirements of the project. Reading product specifications can guide you to the best choice.

DIY vs. Professional Installation

Pros and Cons of DIY

DIY installation can save money and be a satisfying project. However, it requires attention to detail and patience to achieve a professional finish.

When to Call a Professional

For large projects or if you’re unsure about the application process, hiring a professional ensures a high-quality, durable seal.

Frequently Asked Questions (FAQs)

  1. What is the best silicone for window sealing? GE Silicone is often recommended for its durability and weather resistance.
  2. Can I use general-purpose silicone for windows? It’s not advisable. Window-specific silicone offers better performance and longevity.
  3. How long does window silicone last? High-quality silicone can last up to 20 years with proper application and maintenance.
  4. Is it necessary to remove old silicone before reapplying? Yes, removing old silicone ensures better adhesion and a cleaner finish.
  5. Can I paint over silicone? Most silicones are not paintable. If you need a paintable sealant, look for silicone specifically labeled as paintable.


Choosing the best silicone for your windows involves considering durability, flexibility, weather resistance, and adhesion properties. Brands like GE, DAP, Gorilla, and Loctite offer excellent options for various needs. Proper application and maintenance are crucial for a long-lasting seal. Whether you decide to go the DIY route or hire a professional, selecting the right silicone will ensure your windows remain secure and weatherproof for years to come.


Boost your business with our high quality services