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Frequently Asked Questions
Q
What does "neutral curing" mean for the JF402 sealant, and why does it matter?
Neutral curing means the sealant releases neutral by-products (such as alcohol) during the curing process rather than acidic ones. This makes it non-corrosive to sensitive substrates like metals, coated glass, and natural stone, making it safe and compatible with a wide range of building materials.
Q
How does fast curing benefit curtain wall construction projects?
Fast curing significantly reduces the window of time during which the sealant surface is exposed to adverse weather conditions. This minimizes the risk of surface deformation, contamination, or incomplete bonding caused by rain, dust, or temperature fluctuations during the curing period.
Q
What temperature range can the JF402 sealant withstand after curing?
After fully curing, JF402 maintains excellent elasticity across an extreme temperature range. It remains flexible and crack-free at temperatures as low as -50°C and does not soften or degrade at temperatures as high as 150°C, making it suitable for demanding climate environments.
Q
Is JF402 suitable for use in outdoor curtain wall applications?
Yes. JF402 is specifically designed for curtain wall applications. Its excellent weathering resistance — including UV resistance, ozone resistance, heat/cold resistance, and water resistance — ensures long-term durability and performance in outdoor environments.
Q
Can JF402 handle the movement and deformation of curtain wall joints?
Yes. JF402 is engineered to accommodate normal expansion and shear deformation that occurs in curtain wall systems due to thermal cycling, wind loads, and building settlement. The sealant maintains its structural integrity and performance characteristics throughout these movements.
Q
What building materials is JF402 compatible with?
JF402 offers excellent adhesion to most common building materials, including glass, aluminum, coated metals, concrete, stone, and various painted or treated surfaces. Its neutral curing chemistry ensures compatibility without causing staining or corrosion on sensitive substrates.
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