SHUANGYUAN SY-9900 Curtain Wall Silicone Structural Adhesive

I. Product Positioning
The dual-source SY-9900 is a one-component, neutral-cure, room-temperature curing, high-modulus silicone structural sealant specifically designed for structural bonding and load-bearing sealing in building curtain walls. Compliant with GB 16776 and relevant ISO standards, it serves as the core structural adhesive for hidden-frame / semi-hidden-frame glass curtain walls, aluminum panel curtain walls, stone curtain walls, and skylights.

II. Core Performance (Technical Specifications)
Curing System: One-component neutral cure, solvent-free and non-corrosive; surface dry time of 2–15 minutes at room temperature (23°C/50% RH), with uniform deep curing; reliable adhesion to most substrates without primer.
Mechanical Strength: Tensile strength ≥1.5 MPa, ultimate elongation at break ≥300%, Shore A hardness 25–40; high elastic modulus effectively transfers curtain wall loads and accommodates building movement and thermal expansion.
Weathering & Durability: Formulated with original silicone base, resistant to UV, ozone, and aging; stable performance from -50°C to 150°C, no cracking, yellowing, or powdering; designed service life exceeds 30 years.
Bonding Compatibility: Excellent adhesion to glass, tempered glass, coated glass, aluminum alloy, aluminum composite panels, natural stone (marble/granite), stainless steel, etc.; compatible with neutral silicone weathering sealants, with no contamination or discoloration.
Application Properties: Extrudability ≥80 g/min (Ø3mm/3bar), excellent thixotropy, no sagging or dripping on vertical surfaces; packaged in 590ml soft tubes, compatible with standard caulking guns for efficient, clean application.
Environmental & Safety: Low odor, no harmful substance emission; certified CE, RoHS, and MSDS compliant; suitable for high-end indoor and outdoor projects.

III. Typical Application Scenarios
Hidden-frame / Semi-hidden-frame Glass Curtain Walls: Structural bonding between glass and aluminum profiles, transmitting wind loads, self-weight, and seismic forces.
Aluminum Panel / Aluminum Composite Panel Curtain Walls: Structural bonding and waterproof sealing between metal panels and frames.
Stone Curtain Walls: Bonding and sealing of natural stone with metal hangers, preventing alkali efflorescence and staining.
Skylights / Sunrooms: Structural connection between glass and metal frames, accommodating temperature fluctuations and exposure to rain and snow.
Double Glazing Secondary Sealing: Replaces two-component structural sealants; one-component application simplifies construction while ensuring structural integrity of insulating glass units.

IV. Application & Storage Guidelines
Substrate Requirements: Surface must be clean, dry, free of oil, dust, and mold release agents; ideal application temperature range is 5–40°C; avoid condensation and frost.
Sealing Environment: Well-ventilated area with humidity 40%–70% for optimal curing; not suitable for materials exuding oils or plasticizers, or copper/copper alloy substrates.
Storage Conditions: Store in cool, dry place (≤27°C); shelf life 12 months; use promptly after opening to prevent moisture absorption and skinning.

V. Quality Assurance & Advantages
Compliance with National Standards: Strictly adheres to GB 16776-2005 "Silicone Structural Sealants for Building Applications," verified by third-party authoritative testing.
Proven Engineering Performance: Suitable for harsh environments including high temperature, high humidity, and intense UV exposure; widely used in landmark curtain wall projects worldwide.
Overall Value: One-component formulation eliminates mixing requirements, increasing application efficiency by over 30%; long service life and low maintenance result in lower lifecycle costs compared to conventional structural adhesives.