Graphite coated fiberglass cloth is a woven E-glass fabric coated on both sides with expanded graphite. This graphite coated fiberglass fabric, also called graphite coated glass cloth, is engineered for thermal seals, expansion joints, gaskets, and high-temperature insulation. If you need a high-temperature graphite cloth that resists sticking, conducts heat evenly, and maintains flexibility at 550°C, this product is designed for you.
Graphite coated fiberglass cloth offers a continuous operating temperature of 550°C and a short-term peak of 650°C. Standard thicknesses are 0.4 mm, 0.6 mm, and 0.8 mm, and standard widths are 1000 mm and 1500 mm. Custom sizes up to 2000 mm are available.
Applications of Graphite Coated Fiberglass Cloth
Graphite coated fiberglass cloth is used in many industrial sealing and insulation applications:
Expansion joint fabric and compensators – Absorbs thermal movement in ducts and piping.
Flange gaskets and manhole seals – Provides a reliable seal at high temperatures.
Furnace door curtains and heat shields – Protects from radiant heat.
Duct connectors and damper seals – Prevents leakage in hot gas systems.
Anti-stick liners for hot processes – The graphite coating prevents adhesion to metal.
Technical Specifications of Graphite Coated Glass Cloth
| Property | GC-0.4 | GC-0.6 | GC-0.8 | Test Method |
| Total thickness (mm) | 0.40 ±0.05 | 0.60 ±0.06 | 0.80 ±0.08 | ISO 3611 |
| Total area weight (g/m²) | 430 ±30 | 630 ±40 | 840 ±50 | ISO 3374 |
| Base fabric weight (g/m²) | 400 | 600 | 800 | — |
| Graphite coat type | Expanded graphite, both sides | Expanded graphite, both sides | Expanded graphite, both sides | Visual / LOI |
| Width (mm) | 1000 / 1500 | 1000 / 1500 | 1000 / 1500 | Steel tape |
| Warp tensile strength (N/50 mm) | ≥2000 | ≥2800 | ≥3800 | ISO 13934-1 |
| Weft tensile strength (N/50 mm) | ≥1500 | ≥2200 | ≥3000 | ISO 13934-1 |
| Continuous service temp. (°C) | 550 | 550 | 550 | Internal method |
| Short-term peak temp. (°C) | 650 | 650 | 650 | — |
| Loss on ignition (%) | ≤45 | ≤45 | ≤45 | ISO 1887 |
| Moisture content (%) | ≤1.0 | ≤1.0 | ≤1.0 | ISO 3344 |
| Thermal conductivity at 200 °C (W/m·K) | 0.12 | 0.12 | 0.13 | ISO 8302 |
Key Performance Data for Graphite Coated Fiberglass Fabric
Low friction – Coefficient of friction below 0.15 against steel at 200°C.
Non-stick – No adhesive bonding to metal flanges after 500 hours at 500°C.
High strength retention – After 100 hours at 550°C, tensile strength retention exceeds 80% for the 0.4 mm variant.
Chemical resistance – Resists hot water, steam, mineral acids (except HF and hot phosphoric acid), and alkalis up to 100°C.
Fire safety – Non-flammable, meets ISO 1182, self-extinguishing.
Why Choose Our Graphite Coated Fiberglass Cloth?
✔ Continuous 550°C rating – Reliable in extreme heat.
✔ Graphite-coated both sides – Low friction, non-stick, excellent sealability.
✔ High tensile strength – Strong warp and weft values.
✔ Custom sizes available – Thickness 0.25–1.5 mm, width up to 2000 mm.
✔ ISO 9001 certified – Full batch traceability.
OEM/ODM Customization
| Customization option | MOQ | Sample lead time | Sample charge |
| Thickness (0.25 mm–1.5 mm) & width (up to 2000 mm) | 500 kg per size | 7 working days | USD 100 (refunded on order) |
| Coating weight & single-side coating | 500 kg | 10 working days | USD 120 (refunded on order) |
| Private label & custom packaging | 500 rolls | 3 working days (artwork) | Free |
Packaging & Container Loading
Roll length: 30 m standard (50 m available)
Each roll wrapped in PE film → packed in 5-ply corrugated box
Boxes stacked on ISPM 15 heat-treated fumigated pallet (1.1 m × 1.1 m)
Maximum pallet gross weight: 1000 kg
20GP container: 10 pallets, approx. 10 metric tons net
Quality Control
Incoming inspection: glass filament diameter and sizing type verified per lot
In-line monitoring: thread count and graphite coat weight checked every 100 m
Batch traceability: unique lot code traces finished roll to base fabric batch and coating date
Lead Time & Supply
| Order size | Lead time |
| ≤500 kg | 12 working days |
| FCL (approx. 10 MT) | 18 working days |
Trade term: FOB Tianjin (EXW available)
Frequently Asked Questions About Graphite Coated Fiberglass Cloth
Q1: What is graphite coated fiberglass cloth used for?
Graphite coated fiberglass cloth is used for high-temperature seals, expansion joints, flange gaskets, furnace door curtains, and heat shields.
Q2: What is the maximum temperature rating?
The continuous operating temperature is 550°C, with a short-term peak of 650°C.
Q3: Is the graphite coating on one side or both sides?
Our standard product is coated on both sides. Single-side coating is available as a custom option.
Q4: Can you supply custom widths and thicknesses?
Yes. Thickness from 0.25 mm to 1.5 mm and width up to 2000 mm can be produced.
Q5: Does graphite coated fiberglass cloth stick to metal flanges?
No. The graphite coating provides a non-stick surface, and no adhesive bonding occurs after 500 hours at 500°C.
Get a Quote for Graphite Coated Fiberglass Cloth
Need graphite coated fiberglass cloth for your project? Contact us with your required thickness, width, and roll length. We will provide a quote within 24 hours.
