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Two-component silicone sealant is a high-modulus structural silicone sealant specially developed for structural bonding and secondary sealing of insulating glass units (IGU). The two components are precisely mixed by dedicated dispensing equipment, forming a high-strength elastic silicone rubber after curing, ensuring long-term structural integrity and airtight sealing of IGUs.
Key advantages include:
Structural strength exceeding relevant standards by over 1.5×
Extremely low water vapor transmission rate, maintaining IGU dryness
Outstanding weather resistance with stable performance from -50°C to +150°C
Excellent adhesion to various glass types and spacer systems
It is a critical material for the safety and durability of curtain wall insulating glass systems.
Product Video
Watch our application video to see real IGU production performance.
Key Features & Basic Specifications
Core Features
Two-component
Neutral curing
High modulus
Key Parameters
|
Item |
Specification |
|
Mechanical Strength |
Tensile adhesion strength ≥ 0.90 MPa |
|
Moisture Permeability |
Very low water vapor transmission |
|
Curing Characteristics |
Pot life ≥ 20 minutes; Skin time ≤ 3 hours |
|
Curing Method |
Fast deep curing with adjustable curing speed |
|
Packaging |
Component A: 190 LComponent B: 20 L |
Product Advantages
High safety margin
Superior mechanical performance ensures structural reliability
Long-term durability
Excellent weather resistance for decades of service life
High production efficiency
Ideal for automated IGU production lines
Consistent application quality
Machine-controlled mixing guarantees precise ratio and stable performance
Functions, Applications & Scope
Main Function
Provides structural bonding and long-term edge sealing for IGUs, resisting self-weight, wind load and environmental stress.
Typical Applications
Structural assembly of insulating glass units (IGU) for unitized and framed glass curtain wall systems
Insulating glass units for high energy-efficient and sound-insulating architectural windows and doors
Structural insulating glass systems for skylights, canopies, and overhead glazing
Application Notes
Suitable for glass, aluminum spacers, stainless steel spacers, and composite spacers
Application temperature: 10°C–40°C
Substrates must be dry, clean, and free from frost or condensation
Not suitable for continuous or long-term water immersion
Must not come into contact with oily substances, rubber materials, or acidic/alkaline chemicals
Composition
Consists of Component A (silicone polymer base) and Component B (curing agent). Neutral curing after mixing forms a durable silicone elastomer, non-corrosive to coated glass.
Technical Data Sheet
|
Performance Item |
Technical Specification |
Test Conditions & Value Description |
|
Tensile Adhesion Strength |
≥ 0.90 MPa |
Standard conditions; key indicator for structural safety |
|
Tensile Adhesion Strength (90°C) |
≥ 0.68 MPa |
High strength retention after high-temperature exposure |
|
Tensile Adhesion Strength (–30°C) |
≥ 0.68 MPa |
Maintains flexibility and bonding strength at low temperatures |
|
Tensile Adhesion Strength (Water Immersion + UV) |
≥ 0.68 MPa |
Excellent weather resistance and durability |
|
Modulus at 10% Elongation |
≥ 0.15 MPa |
High modulus, strong resistance to deformation |
|
Hardness |
30–60 Shore A |
Balanced hardness after curing |
|
Tack-Free Time |
≤ 3 hours |
Improves application efficiency |
|
Working Time |
≥ 20 minutes |
Ensures sufficient time for continuous application |
FAQ
What is the main difference between two-component and one-component sealants for insulating glass?
Two-component sealants cure independently of ambient humidity, offering faster deep curing and higher strength, ideal for production lines and large projects. One-component sealants are more suitable for on-site repair or small-volume applications.
Are there any requirements for spacer materials?
Compatible with aluminum, stainless steel, and composite spacers. Compatibility testing is recommended for new materials.
What application equipment is required?
A dedicated two-component dispensing machine with a static mixer is required, calibrated according to the recommended mixing ratio.
Is black the only available color?
Standard color is black for easy visual inspection of proper mixing. Custom colors are available upon request.
What happens if the mixing ratio is incorrect?
Incorrect mixing may result in incomplete curing, reduced strength, or tacky surfaces. Strict adherence to the specified ratio is essential.
What is the recommended application temperature?
Recommended application temperature is 10°C–40°C. Temperatures outside this range may affect curing and performance.
Is it compatible with the primary IG sealant?
Compatible with common primary sealants such as butyl rubber; compatibility testing is advised beforehand.
How long does full curing take?
Initial strength is achieved within 24–48 hours, with full performance reached in about 7 days, depending on conditions.
Is it suitable for structural insulating glass applications?
Yes. With high strength and excellent weather resistance, it is widely used in structural IG systems.
What are the storage conditions and shelf life?
Store in sealed containers in a cool, dry place away from heat and direct sunlight. Standard shelf life is 12 months.
Payment Methods
We offer flexible and secure payment methods: T/T, Alibaba Trade Assurance (Alibaba.com Pay), and company bank transfer.
Certifications & Project References
ISO 9001, CE, RoHS certified. Product quality insured by PICC
ISO9001
CE
RoHS
PICC
Why Choose Us
We are not just a manufacturer, but your long-term construction sealing solution partner, providing one-stop service from product performance to export logistics.
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