The sealing quality of the joints in prefabricated buildings directly determines the long-term reliability of the structure. Silicone sealant, with its outstanding comprehensive performance, has become the key material for ensuring the durability of the joints. Its core value lies in its ability to adapt to the dynamic deformation requirements of prefabricated components. High-quality products can withstand a ±25% displacement of the joints, which is much higher than the ±15% of ordinary sealants. This effectively mitigates the stress caused by temperature changes (-60°C to 200°C) and substrate contraction. 
In terms of tolerance to complex environments, silicone sealant performs exceptionally well. After 500 hours of QUV accelerated aging, its strength retention rate reaches 95%, and after 50 freeze-thaw cycles (-20°C to +50°C), it still maintains 88% bonding strength. After 1000 hours of wet heat environment, its performance degradation is less than 8%, and it can withstand long-term ultraviolet rays, ozone and rain erosion, avoiding joint cracking and leakage. When used with a dedicated primer, it can form a strong bond with concrete, aluminum and other substrates. After 7 days of complete curing, it achieves 100% cohesive failure, and even after being immersed in water for 60 days, it still maintains a stable bonding effect. 
The compatibility between construction and formulation is also crucial. It is necessary to ensure that the moisture content of the substrate is below 5% and remove floating dust. Use a continuous extrusion process to fill the joints, and the elastic sealing layer formed after the gelation of the adhesive can block the water infiltration channels. Low modulus and solvent-free silicone sealant can also avoid contaminating the substrate and is suitable for various scenarios such as exterior PC panels and underground projects. Its long-term performance stability extends the service life of the joint in prefabricated buildings to more than 20 years, making it a core material support for improving building durability.