Best Hardware Sealers for Window of 2025

The AP Products Foam Seal is a practical solution for weatherproofing your home. With package dimensions of 16.0L x 15.0W x 0.75H inches, it’s compact yet effective. This weather stripping product helps to block drafts, keeping your indoor space comfortable. By sealing gaps around windows, you can improve energy efficiency and potentially lower your utility bills. The single package quantity ensures you have just what you need for your project. This foam seal is an essential addition to any homeowner's toolkit, making it easier to maintain a cozy living environment.

DAPtex Plus Ltx Foam Sealant, manufactured by DAP, is a high-quality adhesive and sealant designed for professional window and door installations. Its patented formula effectively seals large cracks, gaps, and voids, reducing energy loss and protecting against rain and pest infiltration. This interior exterior formula is also ideal for various sealing projects around your home. DAPtex Plus is paintable and toolable, ensuring a clean and mess-free application. With its tough standards, this foam sealant provides convenience and peace of mind, making it an excellent choice for both professionals and DIY enthusiasts.

The HandiFoam Sealant is a versatile spray foam designed to effectively seal and insulate various openings in your home. This low-pressure, polyurethane foam is ideal for preventing air leaks in hot and dry climates, ensuring you maintain a comfortable indoor environment. It surpasses traditional fireblock materials by blocking smoke and toxic gases during a fire, providing an added layer of safety. You can easily use it with HandiFoam’s gun applicators to fill gaps around windows, doors, and attics, creating a tight barrier against noise and moisture. Plus, it’s AAMA verified, helping to keep your windows and doors from bowing.

Gorilla Seal Liquid is a versatile, flexible, and easy-to-apply rubberized coating that seals out water, air, and moisture to stop and prevent leaks. Its self-leveling formula smoothly covers small gaps and cracks ensuring a watertight seal. When dried, it is temperature and UV resistant resulting in lasting repairs. Works with both latex and oil-based paint, making it paintable. Gorilla Seal Liquid can be used on roofs, gutters, skylights, flashing, chimneys*, PVC pipe joints, windows, RVs, DIY projects, and more! Not for continuous submersion or below-waterline use.

The Beseder Sponge Foam Seal Strip is a reliable and versatile product designed to effectively seal doors and windows. Made from high-quality porous foam material, this strip provides sound absorption, damping properties, and resistance to moisture, dust, wind, and other weather conditions. Its adjustable and flexible design allows for easy customization to suit various purposes such as weatherproofing, gasket or sealing material, and sound deadening. Installing the sponge foam strip is quick and hassle-free, and it effectively prevents cold air, noise, and dust from infiltrating your space. Enhance energy efficiency and comfort in your home, office, or any other premises with the Beseder Sponge Foam Seal Strip, a reliable solution for maintaining an optimal indoor climate and protecting against external elements.

The M-D Caulking Cord is an excellent solution for sealing cracks, gaps, and damaged corners. Made of high-quality PVC, this flexible trim is easy to use and provides a weatherproof seal on both porous and non-porous surfaces. Whether you need to cover wall stress cracks or add a finishing touch to crown molding, wall cabinets, or floors, the M-D Caulking Cord is an intensely practical decoration. Its wide-range application allows it to adhere to almost any smooth surface, including ceilings, tiles, walls, doors, and floors. With its water and heat resistance, durability, and easy installation, this caulking cord offers excellent performance for all your sealing needs.

The Red Devil Foam & Fill is designed specifically for window and door frames, ensuring a secure fit without distorting the frame during installation. Its low-pressure formula allows for easy application while remaining flexible after curing, which means it will move with changes in temperature and humidity. This feature helps to maintain a tight seal over time. Additionally, it enhances energy efficiency by repelling moisture and sealing out air leaks, providing long-lasting insulation. You can also enjoy the convenience of using it for up to 30 days after the initial application, unlike standard canned foam.

The Xmntdo Waterproof Sealant is a versatile solution for all your sealing needs. With its strong adhesion, this waterproof glue penetrates cracks and seams, effectively repairing surfaces and providing a protective barrier against water and air. The clear finish ensures that your surfaces retain their original look, making it perfect for various applications, whether indoors or outdoors. Additionally, it's easy to use; simply mix and apply with a brush or roller to fill small gaps and cracks. Each 35 oz container covers about 14 square feet, allowing for multiple layers if needed.

Flex Seal Rubber Spray is your go-to solution for quickly sealing and protecting surfaces. This versatile product seeps into cracks and holes, creating a waterproof, flexible shield that lasts for years. You can even paint it any color once it dries, allowing for seamless integration with your projects. It works well on both wet and dry surfaces, making it ideal for various tasks, from repairing gutters to protecting wood and RVs. Plus, it maintains its form in extreme temperatures, ensuring reliable performance no matter the season.

Flex Seal Waterproof Spray offers a quick and easy solution for sealing and protecting surfaces. Once dried, it can be painted over, making it perfect for personalizing your projects. This sealant seeps into cracks and holes, creating a watertight, flexible coating that remains pliable for years. You can use it on both wet and dry surfaces, which adds to its versatility. Additionally, it protects against corrosion and won’t sag in the heat or crack in the cold, ensuring long-lasting performance regardless of the weather conditions.