Best Hardware Sealers for Window of 2026

Flex Seal Spray is a versatile rubberized coating that can be used to coat, seal, protect, and stop leaks fast. It seeps into cracks and holes to create a watertight, flexible seal that lasts for many years. This spray is ideal for a variety of projects and hobbies, as well as for protecting surfaces from corrosion. Once dry, it can be painted any color to match your needs. With Flex Seal Spray, you can transform and protect virtually everything, making it an essential tool for any DIY enthusiast or homeowner.

The Gorilla Waterproof Caulk & Seal 100% Silicone Sealant is a great solution for sealing out water, air and moisture, and is ideal for indoor and outdoor use. This sealant is 100% waterproof and resistant to mold and mildew, ensuring that it won't yellow, shrink or crack. It is also water ready in 30 minutes and available in clear and white. Use it for your kitchen, bath, window, door, plumbing, gutters, auto, marine and more!

Gorilla Waterproof Patch & Seal Spray is a flexible, rubberized coating that seals out water, air, and moisture to stop or prevent leaks. Its self-leveling formula smoothly covers small gaps and cracks, ensuring a watertight seal. The spray is temperature and UV resistant, and can be used on various surfaces, including roofs, gutters, skylights, flashing, chimneys, PVC pipe joints, windows, RVs, and more. Additionally, it works with both latex and oil-based paint and can be painted over once dry.

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 Rust-Oleum Tub Tile Paint is designed with a strong 2-part epoxy acrylic formula that lets you prepare and paint your surface all in one day. This durable formula helps protect your tub or tile from moisture and corrosion, keeping it looking fresh longer. To get the best results, you should mix the two parts separately, then combine and stir for two minutes, using the paint within six hours to ensure it works well. It dries quickly, becoming touch-ready in just 20 minutes, so you won’t have to wait long to continue your project. This product covers a small area, making it perfect for touch-ups or minor fixes.

The Sprayman Foam Sealant is a reliable solution for filling gaps and cracks around your home. It sticks strongly to materials like wood, concrete, and metal, so you can trust it to stay put on most surfaces. This foam also provides excellent insulation, helping to keep your home warmer in winter and cooler in summer while reducing noise from outside. Once it dries, you can easily paint, sand, or trim it, making your repair look neat and professional. Plus, it’s UL certified, ensuring it meets high safety and quality standards for your peace of mind.

The SKYLAR LIFE Stain Cleaner is a thick gel that sticks firmly to vertical and hard-to-reach areas like grout lines and silicone caulk. This means you won’t need to scrub hard, saving you effort and time. It effectively removes tough bathroom stains such as dark discoloration, soap scum, and hard-water marks, restoring your tiles and fixtures to a fresh, like-new state. You can safely use it on many surfaces including tiles, silicone caulk, glass, mirrors, and stainless steel, making it versatile for your bathroom and kitchen cleaning needs. Just apply, wait 6–8 hours, then wipe away for a noticeable transformation.

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.

The Tufinein Waterproof Sealant is a versatile, water-based coating that creates a clear, durable waterproof barrier for various surfaces. You can use it both indoors and outdoors, making it ideal for protecting roofs, walls, and even garden structures. Its insulating properties keep out moisture and air, ensuring that your items remain safe from the elements. Additionally, applying this sealant is straightforward, whether you choose to brush, roll, or pour it on. With proper application, you can achieve a long-lasting, aesthetically pleasing seal that withstands temperature fluctuations.

The YKF Clear Waterproof Sealant offers invisible and effective protection against leaks, making it perfect for repairing cracks while keeping your surfaces looking natural. It stands up to all weather conditions, resisting UV rays and extreme temperatures, so you won’t worry about damage in winter or summer. The flexible coating moves with the surface, ensuring long-lasting durability. This sealant applies smoothly and self-levels to fill gaps and cracks efficiently. Within 24 hours, it fully cures to create a strong barrier against water, providing you with reliable, lasting protection indoors and outdoors.