Neutral Silicone Structural Sealant

Neutral Silicone Structural Sealant-High-Performance Elastic Bonding for Structural Glazing, Curtain Walls and Architectural Assemblies

Neutral Silicone Structural Sealant is a high-modulus, moisture-curing elastomeric adhesive engineered to transfer dynamic and static loads between glass, metal, and structural framing. Designed specifically for structural sealant glazing (SSG) systems, it forms a durable, high-strength elastic bond capable of accommodating differential thermal expansion, wind loads, and seismic movement without loss of adhesion.

Unlike standard weatherproofing sealants used strictly for perimeter gap filling, our neutral structural formulations deliver non-corrosive curing chemistry, long-term UV resistance, and proven mechanical strength across diverse environmental conditions.

Performance Specifications

Performance Metric	Typical Technical Value	Standard Test Method
Cure System	Neutral (Alkoxy / Oxime)	—
Component Type	1-Part (Moisture-Cure) / 2-Part (Mixing)	—
Tensile Strength	≥ 1.2 MPa to 2.0 MPa	ASTM C1135 / GB 16776
Elongation at Break	≥ 200% to 400%	ASTM D412
Hardness (Shore A)	35 – 45 Shore A	ASTM C661
Joint Movement Capability	±25% to ±50%	ASTM C719
Service Temperature Range	-40°C to +150°C (-40°F to +302°F)	Internal / Lab Testing
Standard Compliance	ASTM C1184, ETAG 002, GB 16776	Project Verification
Packaging Options	300ml Cartridge / 590ml Sausage / 200L Drum	OEM / Private Label

Note: Structural silicone selection must be verified against actual job-site substrate samples, surface finishes, and calculated wind-load design stresses.

Primary Engineering Applications

Structural Sealant Glazing (SSG)

Two-sided and four-sided structural glazing systems for commercial high-rise curtain walls.

Unitized & Stick Curtain Wall Systems

Factory-applied or field-glazed structural bonding of insulated glass units (IGU) to aluminum mullions.

Metal & Architectural Panel Bonding

Flexible structural attachment for aluminum composite panels (ACP), anodized aluminum, and stainless steel framing.

Protective Glazing Assemblies

Impact-resistant and hurricane-rated glass structures requiring elastomeric stress distribution.

High-end Sunroom Curtain Wall Neutral Silicone Structural Adhesive

Critical Substrate Compatibility & Lab Testing Services

Compatible Substrates (Subject to Adhesion Verification):

Clear, Tinted, and Low-E Architectural Glass
Anodized Aluminum Profiles
Fluorocarbon (PVDF) Coated Aluminum
Stainless Steel and Galvanized Framing
Ceramic Frit Glass and Architectural Metals

Free Project Pre-Testing Support:
To eliminate failure risks on site, we provide project-specific laboratory testing prior to commercial orders, including:

ASTM C1135 Tensile Adhesion Testing
Substrate Peel Adhesion Tests (Dry / Wet / UV-Exposed)
Stain and Compatibility Testing with Gaskets, Setting Blocks, and Backer Rods

Structural Silicone vs. Weatherseal Silicone

Evaluation Factor	Structural Silicone Sealant	Weatherseal Silicone Sealant
Primary Function	Structural load transfer + permanent adhesion	Weatherproofing, movement jointing, draft sealing
Mechanical Design	Engineered for tensile stress and shear forces	Engineered for high movement capacity and fatigue resistance
Core Testing Standard	ASTM C1184 / ETAG 002 / GB 16776	ASTM C920 / ISO 11600
Project Engineering	Requires structural calculation & adhesion reports	Standard joint design guidelines apply
Application Areas	Glass-to-metal structural framing, structural fins	Perimeter joints, expansion joints, window installation

Manufacturing & OEM Supply Capabilities

Custom Color Matching

Standard black, gray, and white, alongside custom color matching for visible structural joints.

Rheology & Cure Rate Adjustment

Modified extrusion rate, skin-over time, and tack-free speed optimized for automated factory glazing lines or hot-weather field installation.

Flexible Industrial Packaging

From standard 300ml cartridges and 590ml foil sausages to 200L bulk drums for two-component automated mixing equipment.

Full Batch Traceability

Comprehensive Certificates of Analysis (COA) provided with every batch, covering extrusion rate, density, tack-free time, and hardness.

FAQ

Q: Is all neutral cure silicone suitable for structural glazing?

A: No. "Neutral cure" refers strictly to the curing chemistry (releasing non-corrosive byproducts). A silicone sealant must be specifically formulated, tested, and certified under ASTM C1184 or equivalent standards to be rated for structural load-bearing applications.

Q: What is the difference between 1-part and 2-part structural silicones?

A: 1-part structural silicones cure via ambient atmospheric moisture, making them ideal for field glazing or standard production speeds. 2-part systems use a base and curing agent mixed mechanically, providing rapid, uniform deep-section curing necessary for high-throughput factory unitized curtain wall assembly.

Q: Is a primer required for structural silicone installation?

A: While many structural silicones exhibit primerless adhesion to standard glass and anodized aluminum, certain PVDF coatings, special metallic paints, or demanding environmental exposures require a dedicated primer. Adhesion testing on actual production samples determines primer requirements.

Q: How do environmental conditions affect structural silicone curing?

A: 1-part moisture-cure silicones rely on relative humidity and ambient temperature. Low humidity or extreme cold will extend skin-over and full-cure times. Joint design depth must allow atmospheric moisture penetration to ensure complete elastomeric vulcanization.

Request Engineering Technical Data & Project Substrates Evaluation

Planning a structural glazing project or sourcing private-label silicone sealants? Submit your project parameters to receive:

01/

Technical Data Sheets (TDS) & Safety Data Sheets (SDS)

02/

Sample Cartridge / Sausage Kits for Initial Evaluation

03/

Substrate Adhesion Testing Protocols & Project Quotation

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[ Contact Engineering Team for Substrate Testing & RFQ ]

We are one of the most professional neutral silicone structural sealant manufacturers in China, featured by quality products and good service. Please rest assured to wholesale high-grade neutral silicone structural sealant in stock here and get pricelist from our factory. We also accept customized orders.

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