PR-999 · Structural
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Neutral Structural Silicone Sealant for Curtain Wall
2026 Annual Inspection Qualified Product
Industry Recommended Product for Architectural Silicone Structural Sealants. Listed as No. 94 in the 2026 qualified product catalogue issued by the Aluminum Window & Curtain Wall Branch, China Building Metal Structure Association. Valid until 31 December 2026.
One-component neutral cure structural sealant for glass, aluminum panel and terracotta curtain walls. Excellent mechanical properties and weather resistance.
| Product Standard | GB 16776-2005 |
|---|---|
| Cure System | Neutral Cure |
| Packaging | 590mL sausage pack |
| Shelf Life | 12 months from production date |
| Transport | Non-hazardous goods |
| Storage | Dry, ventilated, cool place |
Technical Data
| Density | 1.33 g/cm³ |
|---|---|
| Sag resistance (vertical) | 0 mm (max. 3) |
| Tack-free time | 1.0 h (max. 3) |
| Extrusion rate | 1.7 s (max. 10) |
| Shore A hardness | 41 (range 20–60) |
| Tensile adhesion strength (23°C) | 0.85 MPa (min. 0.60) |
| Elongation at maximum tensile strength | 205% (min. 100) |
| Tensile adhesion strength (90°C) | 0.71 MPa (min. 0.45) |
| Tensile adhesion strength (-30°C) | 1.44 MPa (min. 0.45) |
| Tensile adhesion after water / UV exposure | 0.93 MPa (min. 0.45) |
| Shear strength | 0.89 MPa (min. 0.60) |
| Heat ageing — mass loss | 4.3% (max. 6.0) |
| Heat ageing — cracking / chalking | None |
| Alkane plasticizer | Not detected |
Typical values obtained under laboratory conditions (23°C / 50% RH) and not intended for specification purposes. Tested to GB 16776-2005 — Report No. 2025ML009. Download the full test report on request.
Product Characteristics
- One-component, neutral cure system
- Structural bonding for glass, aluminum, terracotta curtain walls
- Excellent mechanical properties — high tensile strength & elongation
- Outstanding weather aging and high/low-temperature resistance
- Excellent adhesion to most building materials, no primer needed
- Transport as non-hazardous goods
Applications
- Structural bonding of glass curtain walls
- Aluminum panel & terracotta facades
- Metal structure engineering
- Other architectural structural uses
Limitations
- Not for materials exuding oil, plasticizer or solvent
- Do not apply on frosty or damp surfaces
- Not for continuous immersion areas
- Apply at 4°C to 50°C surface temperature
Application Scope
