Windshield sealant is a silicone glass sealer that flows into hidden cracks and areas that may be harder to reach. The sealant provides a tough, waterproof, durable, and clear seal that will prove to be resistant to different types of weather conditions, extreme temperatures, vibrations and shocks, and even most chemicals.
To test if you have a leak in your windshield you can do a water check with a spray bottle. Lightly spray the water and let it flow over the edge of the glass. If you have just replaced the windshield and the adhesive has not yet fully dried, then avoid getting water mixed into the adhesive. If you find an area where the water is leaking through, then apply more sealant to ensure that this no longer happens.
Permatex Flowable Silicone Windshield Glass and Sealer
Permatex can be used on windshields, sunroofs, windows, headlamp assemblies, marine glass, and other similar materials. It is designed to effortlessly flow in hidden and harder to reach areas. To provide a durable and waterproof seal that is resistant to weather and extreme temperatures. It dries clear and fills surface voids and irregularities.
Size: 1.5-ounce tube
- Waterproof, durable, clear, easy to use
- May require than one application, longer drying time, has a slight odor
Permatex Black Rubber Sealant
Black Rubber Sealant is a higher strength adhesive and may provide a stronger bond than silicone sealers. It is ready to use and insulates, seals, and caulks and can be used on almost every automotive sealing project. Including weather stripping and door and window glass.
Size: 1.5-ounce tube
- Flexible, durable, waterproof, provides a good seal, dries fast, does not dry out or become brittle, ready to use
- Does not dry clear, works better when applied in warmer temperatures
Eclectic Sealant-Seal All
Seal All Sealant is an all-purpose adhesive and sealant that dries quickly without sacrificing any durability or strength. It is safe to use for most every automobile repair project and is resistant to gas oil, water, and a lot of other solvents. You can go back and apply additional layers if needed and is the perfect sealant to use if you are on the go and need a quick fix. It only takes two to three minutes to dry, but a full cure will take between two and six hours.
Size: 2-ounce tubes, four pack
- Fast drying, forms an immediate bond, can apply additional coats if needed, creates full contact, dries clear, waterproof
- Can be very sticky
J-B Weld Clear All-Purpose Silicone Sealant and Adhesive
J-B Weld Sealant is a general all-purpose silicone sealant that can be used on windshields and windows to provide a tough, mold and mildew-resistant seal that sets in just one hour. After curing, the results will be a seal that will not shrink or crack, it resists weathering and is great for a variety of other automotive and even household applications. J-B Weld is a United States-based company and proudly backs their product. When they say it provides ‘the world’s strongest bond.
Size: 2-ounce tube
- Dries clear works fast, mold and mildew-resistant, tough and durable, water resistant, will not crack or shrink
- May be hard to apply, doesn’t flow even
Devcon Premium Silicone Adhesive
Devcon Silicon Adhesive provides a clear seal that can be used on a variety of different materials including glass, metal, and plastic. It is great to use on windshields. And will form a tough, flexible, and waterproof seal that will resist aging and other forms of weathering. It takes around 10 to 15 minutes to apply, 30 minutes to set. And an additional 12 to 24-hour cure time to be sure that it has properly dried and set.
Size: 1.76-ounce tube
- Weather and water resistant, tough, flexible, does not harden
- Bad packaging with hard to open tube and easily-clogged nozzle
Gorilla Silicone Sealant
Gorilla is a well-known brand and, most of the time is the first product someone can name while discussing adhesives. Gorilla Silicone Sealant is versatile and dries clear. It is ready for water exposure in just thirty minutes and is mold and mildew resistant. The sealant will not yellow or crack over time and is easy to use. Just be sure that the surface is clean and dry before application.
Size: 2.8-ounce tube
- Easy to use, dries clear, does not become discolored, will not crack, versatile, and durable
- Font on instructions is small, tube must remain tightly sealed to prevent continued curing, can be sticky
Titan P2G Auto Glass Sealant Windshield Urethane Glue-Primeless Adhesive
Titan Auto Glass Sealant is a primeless and one-component sealer that is non-conductive, cold-applied, fast curing. And is made from high-velocity polyurethane that is designed for replacing automotive glass parts. It is best applied at room temperature. May require two tubes for most windshield installations.
- Fast curing, non-conductive, dries quickly, high-velocity
- Difficult to apply requires more than one tube
No matter which sealant you choose, remember to weigh up the pros and cons of each. Sealants that dry clear are better suited for windshield applications. And Generally will not yellow or crack. Will provide a continuous seal and durable and versatile protection against water and leaks. Always store the sealant in a cool and dry place. Make sure that the lid is tightly closed. Avoid using sealants in enclosed areas because the fumes may be toxic. Finally, always allow the sealant to cure before driving the vehicle.