Polyurethane automotive windshield sealant is a high-performance adhesive product specifically designed for the bonding and sealing of automotive windshields, suitable for both new car assembly lines and aftermarket windshield replacement scenarios. It exhibits exceptional adhesion to various automotive substrates such as glass, painted metal, and plastic, forming a durable and elastic bonding interface that effectively resists the stresses caused by vehicle vibration, temperature fluctuations, and road bumps during driving. Compared with traditional sealants, it boasts excellent weather resistance, capable of withstanding extreme environmental conditions including high temperatures (up to 150℃ in short-term), low temperatures (down to -40℃), heavy rain, ultraviolet radiation, and chemical erosion from fuels and detergents. Additionally, it features rapid curing properties that meet the efficient production needs of automotive factories, while its good fluidity ensures easy application and full filling of gaps, preventing water leakage, air infiltration, and noise transmission, thereby enhancing the overall safety, comfort, and durability of the vehicle.
2. Features
Superior Elasticity: Maintains excellent elasticity even after long-term use, with an elongation at break of over 300%, which can effectively absorb and buffer the dynamic stress between the windshield and the car body, avoiding glass cracking or seal failure.
Strong Adhesion: Achieves firm bonding without the need for additional primers on most automotive substrates, with a shear strength of more than 2.5MPa, ensuring the windshield remains securely attached to the body even in emergency situations such as collisions.
Excellent Environmental Resistance: Passes strict weathering tests, with no obvious degradation, cracking, or discoloration after long-term exposure to sunlight, rain, and ozone, maintaining stable performance for more than 10 years under normal use conditions.
Efficient Curing: Under normal temperature conditions, it can form an initial strength within 2-4 hours and fully cure within 24 hours, significantly shortening the production cycle of new cars and the maintenance time of after-sales windshield replacement.
Environmental Friendliness: Complies with international environmental standards such as EU REACH and RoHS, free of harmful substances such as formaldehyde and heavy metals, and does not cause pollution to the environment during production and use.
3. Application
New Energy Vehicle Assembly: Used for bonding and sealing windshields of pure electric vehicles, hybrid vehicles, etc., while also providing auxiliary insulation and noise reduction effects to adapt to the high-demand driving environment of new energy vehicles.
Traditional Fuel Vehicle Production: A core sealant product in the assembly process of passenger cars, commercial vehicles, and trucks, ensuring the sealing performance of windshields and improving the vehicle's airtightness and sound insulation.
Automotive Aftermarket Maintenance: It is widely used in the replacement and repair of damaged windshields in 4S stores, auto repair shops, etc. Its easy-to-use characteristics and reliable performance make it the first choice for aftermarket sealant.
Special Vehicle Modification: Applied to the windshield installation of modified vehicles, off-road vehicles, and special operation vehicles (such as emergency rescue vehicles, engineering vehicles), adapting to the harsh working environment of special vehicles and ensuring driving safety.
Auxiliary Sealing of Vehicle Windows: In addition to windshields, it can also be used for the auxiliary sealing of side windows and rear windows of some vehicles, enhancing the overall sealing effect of the vehicle and preventing water leakage and wind noise.