Silicone sealant for exterior walls and curtain walls is a silicone based sealing material specifically used for building exterior walls, glass curtain walls, stone curtain walls, metal panel curtain walls, and other engineering projects. Its core functions are waterproofing, sealing, weather resistance, displacement resistance, and adaptability to joint deformation caused by temperature, wind pressure, and settlement in buildings.
1、 Main classification (commonly used for curtain walls)
In exterior wall and curtain wall engineering, silicone sealant is mainly divided into two categories:
- Silicone structural sealant (structural adhesive)
Core application: structural bonding, load-bearing
Structural assembly of glass and aluminum frame/stone/metal plate
Hidden/semi hidden frame curtain wall glass panel bonding
Enduring mechanical stresses such as wind loads, earthquakes, and self weight
Key Features
Neutral curing (non corrosive to metals, coated glass)
High strength, high modulus, high adhesion
Excellent aging resistance, high and low temperature resistance (-50 ℃~150 ℃)
Compliant with the national standard GB 16776-2025 - Silicone weather resistant sealant (weather resistant sealant)
Core application: Non structural joint sealing, waterproofing, weather resistance
Joint filling between curtain wall panels (glass/stone/aluminum plate)
Sealing of curtain walls, doors, windows, and roofs
Sunroom and skylight joint sealing
Key Features
High elasticity and high displacement ability (usually ± 20%~± 50%)
Super strong UV resistance, ozone resistance, rain and water resistance, and wind and sand resistance
Neutral/alcohol curing, substrate friendly
2、 Core Performance Indicators (Must See for Curtain Walls)
Displacement capability: ± 20%, ± 25%, ± 35%, ± 50% (recommended for exterior walls ≥ ± 25%)
Curing type: neutral curing (acidic adhesive is strictly prohibited for curtain walls, and metals that are prone to corrosion)
Applicable temperature: Construction 5~40 ℃, use -50 ℃~150 ℃
Drying time: 30-60 minutes (25 ℃)
Complete curing: 7-14 days (slower for thicker ones)
Color: Black, Grey, Silver Grey, White, Transparent (Black is commonly used for exterior walls)