Silicone-coated fiberglass offers many advantages; here, we focus on why silicone is applied to fabric. EAS Fiberglass produces a wide range of silicone-coated fabrics using various base materials combined with silicone rubber compounds, delivering multiple performance benefits:

• Abrasion and corrosion resistance
• Excellent chemical resistance
• Durable across a wide temperature range (-70°C to 550°C)
• High flexibility
• Flame and heat resistance
• Oil and water resistance
• Strong weather resistance
• Available in weights from 7 oz/sy to 90 oz/sy

In addition, these fabrics can be produced in various colors and fully customized to meet specific application requirements.

Key Physical & Thermal Properties
Silicone-coated fiberglass fabric delivers balanced performance across multiple properties, not just temperature resistance. Typical values include:

• Service temperature: −60°C to +230°C (peaks to 260°C)
• Tensile strength: 1,500–4,500 N/5 cm
• Tear resistance: 150–500 N
• Weight: 400–1,500+ gsm
• Cold flexibility: no cracking at −60°C
• Flame resistance: self-extinguishing (UL 94 V-0 available)
• Dielectric strength: 10–25 kV/mm

Its wide temperature range (~300°C span) enables use in both extreme cold and high-heat environments—an advantage over PTFE (less flexible in cold) and neoprene (lower heat resistance).

Coating Variants
Performance depends on formulation, not color.

• Red: slightly higher heat resistance (in some grades)
• Gray: general-purpose, cost-effective
• White: clean/food-grade applications
• Black: improved UV resistance for outdoor use

Single vs. Double Coating

• Single-coated: one-sided protection, better grip on uncoated side
• Double-coated: full protection, better sealing and durability (standard for expansion joints, fire curtains)

The Applications of Silicone-Coated Fiberglass

Silicone-coated fiberglass is made of glass fiber cloth and coated with silicone rubber. Often referred to as silicone-coated fiberglass cloth, the fabric is typically engineered for use in industrial applications where high levels of resistance are required against extreme temperatures, flames and chemicals. EAS Fiberglass can manufacture silicone-coated fiberglass fabrics to fit your applications, but examples of where our product range has been used include the following:

Industrial Expansion Joints
Silicone-coated fiberglass is used in fabric expansion joints to handle heat (150–250°C), chemicals, and constant movement. It maintains flexibility, strength, and gas-tight sealing in industries like power, cement, steel, and waste-to-energy.

Welding Blankets & Fire Curtains
Provides protection from sparks, spatter, and heat. The silicone surface resists burn-through, while fiberglass ensures durability. Used for welding blankets (400–600 gsm) and fire curtains (600–1,000 gsm).

Removable Insulation Covers
Acts as a durable outer layer for insulation jackets, protecting against moisture, damage, and contamination. Flexible and reusable, allowing easy maintenance access and cost savings.

Aerospace & High-Temp Sealing
Used in thermal blankets, exhaust insulation, and seals. Offers lightweight, high-temperature resistance, and stability under thermal cycling—ideal for demanding aerospace and military applications.