PTFE Vs. Silicone Coated Fabrics : How to Choose ?

Apr 17, 2026

PTFE Vs. Silicone Coated Fabrics : How to Choose ?
Choosing between silicone-coated and PTFE-coated fiberglass fabric can be challenging, as both offer similar thickness, weight, and strong heat and fire resistance. However, their performance differs depending on the application—silicone excels in flexibility and sealing, while PTFE offers superior chemical resistance and higher temperature tolerance.

Understanding these differences is key to selecting the right material. This article compares the properties, advantages, and limitations of both coatings, and explains where each performs best—helping you choose the most suitable fabric for your specific industrial insulation needs.

Introducing EAS Fiberglass Heat-Resistant Fabrics
EAS Fiberglass manufactures high-temperature fabrics using premium woven fiberglass, enhanced with silicone or PTFE coatings. These coatings provide excellent resistance to heat, moisture, abrasion, and chemicals, turning the fabric into a durable, multi-functional material.

Widely used as outer layers for insulation systems, welding curtains, and equipment protection, these fabrics are engineered for harsh environments. From power generation to metalworking, EAS Fiberglass delivers reliable thermal protection and long-lasting performance where safety is essential.

What is Silicone-Coated Fiberglass Fabric?

Silicone-coated fiberglass fabric combines strong woven fiberglass with heat-resistant, flexible silicone rubber. It performs reliably in extreme temperatures and resists chemicals, oil, and moisture.

Widely used in welding blankets, expansion joints, fire curtains, and insulation covers, it offers a durable solution where heat resistance and flexibility are critical.

Properties of Silicone-Coated Fiberglass Fabric

Silicone-coated fiberglass combines the strength of fiberglass with the flexibility of silicone, delivering reliable heat, moisture, and chemical resistance. It is widely used for high-temperature protection such as welding blankets, insulation covers, and fire curtains.

Key features:

Flexible & easy to fabricate – ideal for complex shapes
Wide temperature range – approx. -70°C to 260°C
Chemical & oil resistance – suitable for many industrial environments
Good release properties – reduces sticking
Cost-effective – more economical than PTFE alternatives
PFAS-free – safer for environment and health

What is PTFE-Coated Fiberglass Fabric?

PTFE-coated fiberglass fabric is made by applying polytetrafluoroethylene (PTFE, commonly known as Teflon®) to woven fiberglass. It offers outstanding heat resistance, non-stick performance, and excellent chemical resistance.

The PTFE coating creates a smooth, easy-to-clean surface with strong electrical insulation, making it ideal for demanding industrial uses such as insulation covers, expansion joints, conveyor belts, gaskets, and high-temperature linings.

Properties of PTFE-Coated Fiberglass Fabric

PTFE-coated fiberglass offers superior performance in extreme industrial environments, especially where chemical exposure and high temperatures are involved.

Excellent non-stick surface – easy release of sticky or resinous materials
Outstanding chemical resistance – resists acids, alkalis, and solvents
High temperature resistance – approx. -73°C to 300°C
Low friction – reduces drag and improves efficiency
Strong weather resistance – excellent UV stability for outdoor use

Note: PTFE materials may contain PFAS, which are persistent in the environment and subject to increasing regulatory restrictions in some regions.

Key Differences: Silicone vs PTFE Coated Fiberglass Fabric

Feature	Silicone Coated Fiberglass	PTFE Coated Fiberglass
Flexibility	Excellent	Moderate
Non-stick performance	Good	Exceptional
Chemical resistance	Moderate	Excellent
Temperature range	-73°C to 260°C	-73°C to 300°C
Cost	Lower	Higher
Fire performance	Better	Good
Typical applications	Flexible insulation covers, expansion joints, fire blankets	Non-stick surfaces, conveyors, expansion joints, insulation systems

Summary:
Silicone is preferred for flexibility, sealing, and cost efficiency, while PTFE is chosen for superior non-stick performance, chemical resistance, and higher temperature capability.

How to Choose the Right Fabric for Your Application

Choosing between silicone-coated and PTFE-coated fiberglass depends on your operating conditions and performance needs.

Start by identifying the required temperature range—moderate heat resistance (silicone) or higher thermal limits (PTFE). Then consider the environment: chemical-heavy applications typically favor PTFE, while general industrial, outdoor, or mechanical uses often suit silicone.

Also evaluate flexibility, handling frequency, abrasion resistance, and exposure to moisture or weather. The right choice depends on balancing durability, cost, and long-term performance in your specific application.

Thermal Insulation Covers
Removable insulation covers (insulation jackets) are flexible thermal solutions made from silicone or PTFE coated fiberglass fabric. They wrap around pipes, valves, or equipment to reduce heat loss, improve efficiency, and allow easy maintenance access.

Silicone coated fabric: best for high-temperature, non-corrosive environments and cost-sensitive projects.
PTFE coated fabric: preferred for chemical, acidic/alkaline, or ATEX environments requiring frequent cleaning.

Fabric Expansion Joints
Fabric expansion joints absorb thermal movement, vibration, and stress in ducting and piping systems. They rely on silicone or PTFE coated fiberglass for flexibility and sealing performance.

Silicone coated fabric: commonly used as outer layer protection in general industrial systems, but not suitable for highly corrosive gases.
PTFE coated fabric: used in corrosive environments (e.g., flue gas desulfurization), serving as both sealing and protective layer.

Industrial Thermal Sealing Gaskets
Thermal gaskets provide sealing in high-temperature systems to prevent gas or fluid leakage in industries like chemical, oil, and food processing.

Silicone coated fiberglass: offers better flexibility and lower cost for general high-temperature sealing.
PTFE coated fiberglass: ideal for harsh chemical environments, providing superior chemical resistance and low friction performance.

EAS Fiberglass Co., Ltd is a professional fiberglass products supplier and provides comprehensive and effective material industrial solutions covering the market of high-performance FRP, highly effective temperature insulation, and highly convenient construction. Nowadays, EAS owns various product lines of fiberglass yarn forming, woven fabrics, fabric coating/lamination, FRP, etc. The complete product lines enable EAS to master the quality control and products market competitive. Taking this advantage involves us in many projects and enhance brand promotion. Certified ISO9001-2008 equips EAS staff and management with a more professional operation. Certification of test reports for products is made by third-party laboratories SGS, TUV, DNV, etc.

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