neutral silicone sealant weather resistant sealant for curtain walls is a single component, neutral curing silicone sealant designed specifically for outdoor joints such as glass/aluminum curtain walls. It focuses on weather resistant, waterproof, displacement resistant, and non corrosive substrates, with a lifespan of over 20 years.
1、 Core Features
Neutral curing: non corrosive, suitable for sensitive substrates such as aluminum alloy, stainless steel, coated/Low-E glass, stone, etc.
Extremely weather resistant: resistant to ultraviolet rays, ozone, salt spray, and acid rain; -Maintain elasticity from 50 ℃ to+150 ℃, without cracking, brittleness, or softening.
High displacement capability: commonly at levels 25/35/50 (± 25%/± 35%/± 50%), suitable for curtain wall expansion and deformation.
Single component easy to use: room temperature moisture curing, can be applied at 4-40 ℃, no need for primer, good extrusion performance.
Elastic recovery: recovery rate ≥ 80%, anti sagging, no cracking.
Excellent compatibility: Compatible with other neutral silicone adhesives, does not contaminate stone/coating.
2、 Typical Technical Parameters (GB/T 14683-2023)
Appearance: Paste like, no bubbles
Dry time: ≤ 3 hours
Squeezing ability: ≥ 150 mL/min
Pendulum: ≤ 3 mm (vertical)
Displacement capability: ≥ ± 35% (preferably level 35 or above for curtain walls)
Elastic recovery rate: ≥ 80%
Shore hardness: 25-45 A
Tensile bonding strength: ≥ 0.5 MPa
Aging: 5000 hours of UV without powdering, cracking, or discoloration
3、 Main applications
Weather resistant sealing of outdoor joints for glass curtain walls, aluminum/stone curtain walls
Waterproof sealing of doors, windows, skylights, canopies, and expansion joints on exterior walls
Metal/concrete/stone joint weather resistant and waterproof
Outer sealing of insulated glass (non structural adhesive)
4、 Difference from structural adhesive
Weather resistant adhesive: good elasticity, large displacement, strong weather resistance; Used for waterproof sealing of seams, non load bearing.
Structural adhesive: high strength and modulus; For bonding curtain wall structures (such as glass and aluminum frames), special compatibility tests are required.
5、 Key points of construction
The substrate is clean and dry, free of oil stains and dust;
Apply masking paper to the seams and immediately trim the edges after gluing;
Construction temperature: 4-40 ℃, humidity: 50% -90%;
Avoid rain and pollution before the surface dries (about 3 hours);
Curing: Initial curing after 24 hours, reaching strength after 7 days.
