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Structural Silicone Sealant

Structural Glazing Silicone for Curtain Wall & Façade Engineering Systems (Engineering Specification Document)
Structural Silicone Sealant is a neutral-curing silicone adhesive designed for use in structural glazing systems, curtain wall façades, and engineered building envelope applications. It functions as a component within a designed façade system where loads, movements, and environmental exposure are calculated by structural engineers.
This product is intended for high-rise curtain walls, unitized façade systems, skylights, aluminum-glass assemblies, and photovoltaic mounting systems, where long-term performance depends on system design, installation quality, and material compatibility.

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Engineering Application Scope

This product is designed for use in the following engineered façade systems:

Curtain Wall Structural Systems

Used in glass-to-metal façade assemblies where adhesive bonding contributes to load transfer within a designed structural system.

Structural Glazing Systems

Applied in systems where glass panels are bonded to supporting frames without mechanical fasteners as the primary structural fixing method.

Unitized Curtain Wall Production

Used in factory-controlled assembly environments for prefabricated façade modules requiring controlled curing and repeatable performance.

Building Envelope Systems

Applied in skylights, canopies, and architectural glazing systems exposed to wind load, UV radiation, and thermal cycling.

Photovoltaic & Solar Systems

Used as sealing and bonding material in selected solar mounting applications based on system engineering requirements.

Technical Data

The following values represent typical laboratory test results under controlled conditions. Actual performance may vary depending on system design, substrate type, and installation conditions.

Property	Value	Standard
Curing System	Neutral Cure	-
Type	1K / 2K Silicone System	-
Density	1.3 – 1.5 g/cm³	ASTM D1875
Skin Time	10 – 30 min (23°C, 50% RH)	ASTM C679
Cure Depth	2 – 3 mm / 24h (1K system)	-
Tensile Strength	≥ 1.0 MPa	ASTM C1135
Movement Capability	±25% to ±50%	ASTM C719
Hardness	35 – 50 Shore A	ASTM C661
Service Temperature	-40°C to +150°C	-
UV Resistance	Pass (no cracking or chalking)	ASTM C1184

System Performance Description

Structural performance is defined at the system level and depends on joint design, substrate preparation, and façade engineering calculations.
Load Transfer Mechanism
Functions as an elastomeric load-transfer interface within structural glazing systems, distributing wind load and movement-induced stress across bonded surfaces.
Adhesion Stability
Designed to maintain adhesion under long-term exposure to glass, aluminum, stainless steel, ceramic, and coated façade materials when properly prepared and tested.
Movement Accommodation
Accommodates thermal expansion, wind-induced movement, and structural deflection within designed movement limits.
Environmental Resistance
Resistant to UV radiation, moisture, temperature cycling, and atmospheric aging in exterior façade environments.
Design Service Life
Up to 20 years under properly engineered and correctly installed façade systems, depending on design conditions and environmental exposure.

Neutral Cure Structural Silicone Sealant

Engineering Use Conditions

This product is not a standalone structural system. It is a component material used within engineered façade assemblies.
Performance depends on:
●Structural joint design by qualified façade engineers
●Substrate compatibility and surface preparation
●Validated system design and load calculations
●Controlled installation procedures
Compatibility testing and engineering validation are required prior to large-scale application.

System Selection Logic

One-Component Silicone (Moisture Cure System)
Field installation and on-site application
Cures via atmospheric moisture
Suitable for maintenance and retrofit work
No mixing equipment required

Two-Component Silicone (Chemical Cure System)
Factory production of unitized curtain wall systems
Controlled industrial assembly environments
Independent of humidity conditions
Provides predictable curing behavior and production efficiency

Standards & Compliance Framework

Designed in accordance with international façade engineering standards:
ASTM C1184 – Structural Silicone Sealants
ASTM C719 – Movement Capability Testing
ETAG 002 – Curtain Wall Systems Guideline (EU)
EN 13022 – Glass in Building
ISO 11600 – Sealant Classification
ISO 9001 – Quality Management System

Documentation Availability
Third-party laboratory test reports (SGS / TÜV or equivalent) and internal quality control documentation are available upon request for qualified EPC contractors and engineering consultants.

Engineering Responsibility Statement

Structural silicone sealants are part of a larger engineered façade system and do not independently determine structural performance.
Final system performance depends on:

Façade engineering design and structural calculations
Substrate compatibility and material selection
Installation quality and environmental conditions
Compliance with local building codes and standards

Users are responsible for system-level engineering validation before application.

OEM / ODM Manufacturing Capability

We provide global OEM/ODM services for façade system suppliers and construction material distributors.

01/

OEM Services
Private label production
Packaging localization
Regulatory labeling support
Market-specific adaptation

02/

ODM Services
Modulus and curing behavior adjustment
High-performance formulations (marine / photovoltaic / high-temperature)
Application-specific optimization
Color and viscosity customization

Packaging System

280ml / 300ml cartridges

600ml / 900ml sausage packs

200L drums

IBC bulk containers

FAQ

Q: What is structural silicone sealant used for?

A: It is used in engineered curtain wall and structural glazing systems where adhesive bonding contributes to load transfer within a designed façade structure.

Q: What is the service life?

A: Up to 20 years in properly engineered and correctly installed façade systems.

Q: Is primer always required?

A: Not always. It depends on substrate type, coating system, and results of adhesion testing.

Q: What is the difference between 1K and 2K systems?

A: 1K systems cure via atmospheric moisture. 2K systems cure via chemical reaction and are used in industrial production environments.

Q: Can it be used outdoors?

A: Yes. It is designed for long-term UV exposure, weathering, and thermal cycling.

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