DOWSIL™ 791 Weatherproofing Sealant for Building Facade & Glazing
Product Introduction of DOWSIL™ 791 Silicone Weatherproofing Sealant
Basic Product Attributes
DOWSIL™ 791 is a one-part, neutral-cure silicone weatherproofing sealant designed for building facades and glazing applications.
Product Description
DOWSIL™ 791 offers exceptional weatherability and elasticity, maintaining performance stability within -50°C to 150°C without hardening or cracking. Its ready-to-use formula requires no mixing and cures into a durable, flexible silicone rubber seal, suitable for vertical and wide joints.
Special Properties
Key Features:
- Weatherability: Resists sunlight, rainwater, snow, ozone, and extreme temperatures.
- Workability: 20-minute working time, 45-50 minutes tack-free time (23°C, 50% RH).
- Non-sag: Ideal for vertical joints; minimum joint width/depth of 6mm.
- Certifications: Complies with GB/T 14683-2003, JC/T 882-2001, and ASTM C920.
Applications
- Glass curtain walls and aluminum extrusions in high-rise buildings.
- Composite panels in harsh weather conditions.
Technical Parameters
| Test Standard | Property | Unit | Result |
| ASTM C639 | Flow (Sag/Slump) | inches(mm) | 0 |
| ASTM C661 | Shore A Hardness | points | 25-30 |
| ASTM D624 | Tear Strength (Die B) | kN/m | 6.8 |
| ASTM C719 | Joint Movement | % | ±50 |
| ASTM C1135 | Tensile Strength | psi(MPa) | 120 (0.83) |
| Elongation at Break | % | 420 |
Notes
- Storage: 12-month shelf life in unopened containers below 32°C.
- Safety: Refer to SDS before handling.
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global leaders including:
Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through:
Mandatory pre-production samples approval
Final inspection by QC team before shipment
International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers
Expert Support:Technical guidance for product selection
Global Compliance:Certifications meeting target market standards
Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF
Payment:USD/EUR/CNY/HKD via T/T, L/C
Support:Technical consultation & logistics coordination
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