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The Leading Manufacturer of Silicone Sealants in China

Professional manufacturer of high-performance silicone and polyurethane sealants for curtain walls, windows, solar panels, and industrial applications. Trusted by top builders and engineers across Asia, Europe, and North America.

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Quality First

We always put quality first and strictly supervise the product quality at every stage of production. From raw materials to final packaging, every batch is tested for consistency and performance.

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ISO Certified

Our factory is ISO9001:2008 certified, ensuring world-class quality management systems. We are a premier manufacturer of cost-effective, high-performance sealants trusted globally.

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15+ Years Expertise

Founded in 1984, Siway is one of China’s top ten silicone structural sealant manufacturers. With over 12 automated production lines and 220,000 sqm factory space, we produce up to 20,000 tons annually.

Siway Factory and Production Line

About Siway

Shanghai Siway Building Material Co., Ltd., founded in 1984, is one of China’s top ten silicone structural sealant manufacturers, ranked seventh in the industry. We have earned multiple honors including “User’s First Choice Brand” and “Market Best Performance.”

With a factory area exceeding 220,000 square meters and 12 state-of-the-art automated production lines, Siway is among the largest silicone sealant manufacturers in China, with an annual production capacity of 20,000 tons.

  • • Over 15 years of specialized sealant manufacturing
  • • ISO9001:2008 Certified Quality Management
  • • Complete range of one-part and two-part silicone sealants
  • • Exported to over 50 countries worldwide
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Our Products

We manufacture a complete line of high-performance sealants for construction, industrial, and specialty applications. All products are rigorously tested for durability, adhesion, and weather resistance.

SV-8890 Two-component Silicone Structural Glazing Sealant

SV-8890

Two-component Silicone Structural Glazing Sealant

  • High strength & durability
  • Excellent UV and weather resistance
  • Ideal for curtain wall systems
SV-8800 Factory Direct Silicone Sealant for Insulating Glass

SV-8800

Factory Direct Silicone Sealant for IG Units

  • Low modulus, high elasticity
  • Moisture-cure, one-part system
  • Perfect for double-glazed windows
SV-995 Neutral Silicone Sealant

SV-995

Neutral Silicone Sealant

  • Non-corrosive, acetoxy-free
  • Excellent adhesion to glass, metal, and plastics
  • Used in sensitive electronic and architectural applications
SV-777 Silicone Sealant for Stone

SV-777

Silicone Sealant for Stone

  • Stain-resistant formula
  • Prevents discoloration on marble and granite
  • High movement capability ±25%
SV-999 Structural Glazing Sealant

SV-999

Structural Glazing Neutral Silicone Sealant

  • High tensile strength
  • Meets ASTM C1184 standards
  • Used in high-rise curtain wall installations
SV-119 Fire Resistant Silicone Sealant

SV-119

Fire Resistant Silicone Sealant

  • Intumescent properties
  • Rated for up to 3 hours fire resistance
  • Used in fire-rated glazing and partitions
SV-628 Acetic Cure Silicone Sealant

SV-628

Acetic Cure Silicone Sealant (Drum)

  • Fast curing in humid conditions
  • Strong adhesion to most substrates
  • Available in 200L drums for industrial use
SMP-333 MS Polymer Sealant

SMP-333

Industrial Silane Modified Polyether Sealant

  • Paintable and sandable
  • Low VOC, environmentally friendly
  • Excellent for prefabricated construction
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Applications

Our sealants are engineered for performance in the most demanding environments.

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Curtain Wall

High-strength structural glazing sealants for glass façades and aluminum framing systems.

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Windows & Doors

Weatherproof, flexible sealants for residential and commercial window installations.

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Insulating Glass (IG) Units

Primary and secondary sealants for double and triple-glazed units.

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Roads & Bridges

Durable joint sealants resistant to traffic, vibration, and temperature extremes.

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High-Speed Rail & Subway

SV-GT2000 silicone sealant designed for rail vehicle and tunnel applications.

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Solar Photovoltaic

UV-resistant sealants for solar panel framing and mounting systems.

Why Choose Siway?

  • ✔ Top 10 silicone sealant manufacturer in China
  • ✔ 20,000 tons annual production capacity
  • ✔ ISO9001:2008 certified quality management
  • ✔ Products exported to over 50 countries
  • ✔ Technical support and custom formulation available

Key Stats

1984
Founded
220K+
Factory Area (sqm)
12
Automated Lines
50+
Countries Served

Frequently Asked Questions

What is the shelf life of your silicone sealants?

Most of our one-part silicone sealants have a shelf life of 12 months when stored in a cool, dry place. Two-part systems may vary; refer to product datasheets.

Are your products suitable for outdoor use?

Yes, all our structural and weatherproofing sealants are designed for long-term outdoor exposure with excellent UV, rain, and temperature resistance.

Do you offer custom formulations?

Yes, we provide OEM and custom formulation services based on specific project requirements and performance needs.

Can I use your sealants for fire-rated assemblies?

Yes, SV-119 Fire Resistant Silicone Sealant is specifically designed for fire-rated joints and glazing systems, tested up to 3 hours.

Where is your factory located?

Our manufacturing facility is located in Shanghai, China, with over 220,000 square meters of production space.

Get in Touch

For inquiries about our products, pricing, or technical support, please visit our official website to contact us directly.

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Contact Information

Business Hours

We respond to all inquiries within 24 hours during business days (Monday to Friday, 9:00 AM – 5:30 PM China Standard Time).

Our team includes technical experts who can assist with product selection, application guidance, and project support.

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