Structural Silicone Sealant

Structural Silicone Sealant is a high-performance, neutral-curing silicone sealant specially developed for modern curtain wall systems and industrial structural bonding. It is non-corrosive to glass, metal, stone, and other substrates, offering exceptional structural bonding strength and long-term weather resistance up to 50 years. Maintaining elasticity and strength from -50°C to +150°C, it provides a permanent, safe, and reliable bonding and sealing solution for structural joints in curtain walls, metal roofing systems, and skylights.

Inquire Now Next Products

Videos Product Description Technical Specifications & FAQ

Product Video

Watch our application video to see structural silicone sealant performance in real projects.

Key Features & Typical Properties

Key Features & Highlights

Item	Description
Curing System	Neutral cure
Designed For	Structural glazing
Substrates	Glass, metal, stone
Temperature Resistance	-50℃ ~ +150℃
Durability	Designed service life up to 50 years

Main Functions & Applications

Main Functions

Structural bonding

Structural sealing

Wind load and movement accommodation

Long-term weather protection
Typical Applications

Curtain Wall Systems

Unitized, fully hidden, and semi-hidden frame glass curtain walls

Structural bonding and sealing for stone curtain walls and metal panel curtain walls

Skylights & Metal Roofing

Structural bonding for glass skylight systems

Metal roofing systems designed to withstand wind loads and self-weight

Industrial & Special Projects

Secondary sealing for insulating glass units (IGU)

Metal structures in large public buildings such as airports and railway stations

Assembly of special glass engineering projects
Application Scope & Precautions

Application Conditions

Substrates must be clean, dry, and free from oil, grease, and dust.

Application temperature: 10°C – 40°C.

Recommended relative humidity: 40% – 80%.

Limitations

Not suitable for permanent water immersion or continuously damp environments (e.g. basins or pools).

Not suitable for completely enclosed or unventilated structures.

Do not apply on frosted, wet, or dew-covered substrates.

Not suitable for materials that bleed oils, plasticizers, or solvents.

Avoid contact with strong acids or strong alkaline substances.
Composition & Materials

Based on high-quality RTV methyl silicone rubber, formulated with crosslinkers, reinforcing fillers, and weather-resistant additives to ensure long-term structural stability.

Technical Specifications / Performance Data

Performance	Test Conditions / Standard	Result	Application Benefit
Tensile Adhesion Strength	Standard conditions	≥ 1.10 MPa	Core structural safety and load-bearing reliability
Elongation at Break	23°C, at maximum tensile strength	≥ 130%	Absorbs structural movement and reduces stress
Weathering Resistance	After water immersion & UV exposure	≥ 0.90 MPa	Long-term durability and performance retention
Thermal Stability	-30°C / 90°C	≥ 0.60 MPa	Reliable performance under extreme temperatures
Tack-Free Time	—	≤ 3 hours	Improved application efficiency
Extrudability	—	≤ 10 seconds	Suitable for both manual and automated application

FAQ

Q

How should I choose between one-component and two-component products?

A

One-component sealants are suitable for on-site applications, while two-component sealants are recommended for large-scale projects and factory-prefabrication, offering faster and more controlled curing.
Q

How long does it take before the sealant can bear structural loads?

A

Practical strength is typically achieved within 3–7 days, while full cure generally requires approximately 21 days.
Q

How can reliable adhesion be ensured?

A

It is recommended to conduct on-site adhesion tests before project commencement. Technical support and testing guidance can be provided upon request.
Q

Can the color be customized?

A

Standard colors are black and white. Customized colors are available based on project requirements.
Q

How should cured sealant joints be repaired?

A

Remove the damaged portion and clean the surface thoroughly. Fresh sealant can then be applied directly onto the existing cured sealant.

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