Overview

PTFE coated fibreglass fabric is a composite of two materials that complement each other precisely. The woven fibreglass base supplies the tensile strength, dimensional stability and heat resistance — it does not stretch, sag or shrink. The PTFE coating supplies the surface: chemically inert, and with the lowest coefficient of friction of any solid, so nothing sticks to it. The combination gives you a fabric that can be pulled tight, run continuously over rollers at temperature, and still release even the stickiest product cleanly.

It is used wherever something hot and sticky has to be handled without adhering — baking and drying conveyor belts, heat-sealing and welding surfaces, release sheets, and non-stick linings on hoppers and chutes. It is dimensionally stable from about −73 °C to +260 °C, and it has excellent flex-fatigue resistance, which is why it survives running around small-diameter rollers indefinitely where a rigid material would crack.

One thing to be clear about: the 260 °C ceiling comes from the PTFE coating, not the glass. The fibreglass base underneath would happily take considerably more heat — plain glass cloth is rated to around 550 °C. It is the coating that degrades first. So if you need a heat barrier at 400 °C or 500 °C, this is the wrong product — you want uncoated glass cloth, and you will simply lose the non-stick property. Buy PTFE-coated fabric for its surface, not for its temperature rating.

Specifications

Typical properties for PTFE coated woven fibreglass fabric. Thickness, weight and tensile strength vary with the base cloth and coating weight — tell us the duty and we will match the grade.

Property	Value	Test Standard
Construction	Woven fibreglass base with PTFE coating	—
Base Fabric	Woven E-glass fibreglass	—
Coating	PTFE (polytetrafluoroethylene)	—
Continuous Service Temperature	−73°C to +260°C	—
Temperature Limited By	The PTFE coating — not the glass base	—
Coefficient of Friction	0.05 – 0.10 (PTFE surface)	ASTM D1894
Non-Stick / Release	Excellent — the reason to buy it	—
Thickness Range	~0.08 mm – 1.0 mm (grade-dependent)	—
Tensile Strength	High — from the fibreglass base	ASTM D5035
Dimensional Stability	Excellent — will not stretch or shrink	—
Flex-Fatigue Resistance	Excellent — suits small-diameter rollers	—
Chemical Resistance	Excellent (pH 0 – 14) — PTFE surface is inert	—
Moisture Absorption	Effectively nil	—
Food Contact	Food/FDA-grade coating available	FDA 21 CFR 177.1550
Electrical	Good dielectric — PTFE is an excellent insulator	—
Supply Form	Roll (plain), adhesive-backed tape, or made-up endless belt	—
Colours	Brown (standard) or black (anti-static)	—

Properties in Detail

Surface Properties (the PTFE)

Non-Stick Release: Excellent — the whole point of the product
Coefficient of Friction: 0.05 – 0.10
Chemical Resistance: pH 0 – 14 (inert)
Max Temperature: 260°C — this is the limiting factor
Cleanability: Wipes clean; product does not build up

Strength Properties (the Glass)

Tensile Strength: High
Dimensional Stability: Excellent — no stretch, no shrink
Flex-Fatigue Life: Excellent — runs over small rollers
Base Heat Capability: Far above 260°C — but the coating limits you
Moisture Absorption: Effectively nil

Forms & Options

Plain Roll: Cut to size for linings, release sheets
Adhesive-Backed: Self-adhesive tape for sealing bars & surfaces
Endless Belt: Joined to your machine centres
Anti-Static: Black conductive grade available
Food Grade: FDA-compliant coating available

Manufacturing

The fabric is made by weaving E-glass fibreglass yarn into a base cloth, then impregnating and coating it with a PTFE dispersion, which is dried and sintered onto the glass. Multiple coating passes build up the PTFE layer; a heavier coating gives better release and longer life, while a lighter coating gives a thinner, more flexible fabric. This is the main variable between grades, and it is what you are choosing when you specify a weight.

The weave of the base cloth determines the mechanical character. A tight, heavy weave gives high tensile strength and dimensional stability for a belt under tension; a lighter, more open weave gives a thinner and more drapeable fabric for lining and release-sheet work. For drying ovens where air must pass through the belt, an open-mesh construction is used instead — see our PTFE Mesh Conveyor Belt.

Sintering the PTFE onto the glass is what bonds the two permanently. The result behaves as a single composite rather than a coated cloth: it does not delaminate in normal service, and the PTFE does not peel off the glass.

Thickness Grades & Forms

Thickness is chosen for the duty: thin for release sheets and heat-sealing, heavier for conveyor belts that must carry load and survive tension.

Thickness	Character	Typical Use
~0.08 mm	Very thin, highly flexible	Heat-sealing bar covers, release sheets
~0.13 mm	Thin, flexible	Sealing surfaces, light release work
~0.18 mm	Light-medium	Light conveyor belts, oven liners
~0.25 mm	Medium — the common general grade	Conveyor belts, general non-stick lining
~0.35 mm	Medium-heavy	Conveyor belts under tension
~0.50 mm	Heavy	Heavy-duty belts, high wear
~1.00 mm	Very heavy	Heavy conveyor, chute lining, high abrasion

Available as plain roll, adhesive-backed tape (for wrapping sealing bars and surfaces), or as a made-up endless belt joined to your machine centres. Tell us the belt length, width and whether it needs to be endless.

Chemical Resistance

The exposed surface is PTFE, so the chemical resistance is PTFE’s — which is to say, almost total. The fibreglass base is only exposed at cut edges.

Medium	Resistance	Notes
Strong Acids	Excellent	PTFE surface is inert
Strong Alkalis	Excellent	PTFE surface is inert
Solvents	Excellent	Unaffected
Mineral Oils & Fuels	Excellent	Unaffected
Steam & Hot Water	Excellent	Within the 260°C ceiling
Food Acids / Sugars	Excellent	Nothing sticks or reacts — ideal for baking
Adhesives & Resins	Excellent	They release cleanly — the core application
Hydrofluoric Acid	Poor	Attacks PTFE (and glass) — do not use
Molten Alkali Metals	Poor	Attacks PTFE — do not use

General guidance for the material family at normal industrial concentrations. See the full Chemical Compatibility Chart, and confirm your exact chemical, concentration and temperature with us before final selection.

Applications

Bought for its surface. Wherever something hot and sticky must be handled and then released cleanly.

Baking & Food Conveyor Belts Dough, pastry, biscuits, confectionery and cheese release cleanly from the non-stick surface at oven temperature. Food/FDA-grade coating is available — specify it for product contact.

Drying & Curing Ovens Conveyor belts for drying and curing lines running up to 260°C. Where air must pass through the belt, use the open-mesh version instead.

Heat Sealing & Welding Bars Adhesive-backed PTFE fabric wrapped around sealing bars and jaws on packaging machines — the plastic film seals but does not stick to the bar. One of its most common uses.

Release Sheets & Press Pads Interleaving and release sheets in heat presses, laminating and composite moulding, where resin or adhesive must not bond to the platen.

Non-Stick Chute & Hopper Lining Lining chutes, hoppers and slides that sticky or hygroscopic product would otherwise cling to and block. The low friction keeps material flowing.

Textile Finishing & Printing Belts and surfaces in screen-printing dryers, stenters and textile curing ovens, where inks and finishes must not adhere to the machine.

Industries

Why PTFE Coated Fiberglass Fabric is specified in each of the industries we serve.

Food & Beverage Processing

Baking and food drying is the natural home of this material, because the whole problem in a bakery oven is that hot dough, sugar and cheese stick to everything. A PTFE-coated fibreglass belt gives a surface that nothing adheres to even at oven temperature, so product releases cleanly, waste drops, and the belt does not need constant scraping and cleaning. Its dimensional stability matters just as much in practice: the belt does not stretch or wander under tension and heat, so tracking stays true through long production runs. The one thing to specify deliberately is the grade — for direct product contact you need the food/FDA-compliant coating, not a standard industrial grade. They look the same, and on an audit the distinction is exactly the sort of thing that gets checked.

Packaging & Printing

Heat-sealing bars are one of the largest uses of this fabric, and it is usually supplied as adhesive-backed tape for the job. The sealing jaw has to press hot against plastic film and then let go cleanly; without a PTFE cover the film welds itself to the bar, and the machine jams and scorches. A PTFE-coated fibreglass tape wrapped around the bar solves it completely, and when it eventually wears it is peeled off and replaced in minutes. In printing and textile finishing, the same material forms belts in screen-printing and curing dryers, where inks, adhesives and finishes must release from the machine rather than build up on it. Its excellent flex-fatigue resistance is what lets it run continuously over small rollers without cracking.

Chemical & Composites

Because the exposed surface is PTFE, this fabric inherits PTFE’s near-total chemical inertness — it is unaffected across the full pH range, by solvents, and by resins and adhesives. In composite moulding and laminating it is used as a release sheet and press pad, so that epoxy and resin cure against it and then lift away rather than bonding to the platen. In chemical handling it lines chutes and hoppers where sticky, hygroscopic or corrosive material would otherwise cling and bridge. The limitation worth remembering is temperature: at 260 °C the coating is at its ceiling, and this is not a high-heat barrier material despite the fibreglass in it.

Textile Mills

Textile finishing runs fabric through dryers, stenters and curing ovens carrying dyes, resins and finishes that will happily bake themselves onto any surface they touch. PTFE-coated fibreglass belts and liners give those machines a surface the finish cannot adhere to, which cuts cleaning downtime substantially and stops contamination being transferred back onto the next batch of cloth. Its non-stick surface and low friction also make it useful as guide and slide surfaces on machinery where fabric must pass without snagging or picking up lubricant. Where the drying process needs air to pass through the belt rather than around it — which is common in screen-print dryers — the open-mesh PTFE belt is the correct product instead of the solid coated fabric.

PTFE Coated Fabric vs Related Products

These are chosen for different reasons. PTFE-coated fabric is bought for its surface; glass cloth is bought for heat. Do not confuse the two.

Property	PTFE Coated Fiberglass	Plain Glass Cloth	Silicone Coated Fiberglass	PTFE Mesh Belt
Max Temperature	260°C (coating limits)	~550°C	~250°C	260°C
Non-Stick Surface	Excellent	No	Good	Excellent
Air Permeable	No (solid)	Somewhat	No	Yes — open mesh
Chemical Resistance	Excellent (pH 0–14)	Good	Fair	Excellent
Tensile Strength	High	High	High	High
Flex-Fatigue	Excellent	Fair	Good	Excellent
Buy It For	Non-stick release surface	Heat resistance	Abrasion + weather	Drying with airflow

Advantages & Limitations

Advantages

Outstanding non-stick release — nothing adheres to it, even hot and sticky product.
Excellent chemical resistance across the full pH range (the surface is PTFE).
High tensile strength and excellent dimensional stability — belts do not stretch or wander.
Excellent flex-fatigue resistance: runs continuously over small-diameter rollers.
Very low coefficient of friction — keeps sticky material flowing in chutes and hoppers.
Effectively zero moisture absorption.
Easy to clean; product does not build up on the surface.
Available food/FDA-grade, anti-static, adhesive-backed, and as made-up endless belts.

Limitations

The 260°C ceiling is set by the PTFE coating, not the fibreglass. It is not a high-heat barrier material — for 400–550°C use plain glass cloth (and accept that you lose the non-stick surface).
The coating will eventually wear through on abrasive duty, exposing the glass base underneath — at which point it stops being non-stick.
Fibreglass base can fray at cut edges; edges should be sealed or hemmed on belts.
Sharp objects will cut or puncture the fabric — it is a fabric, not armour.
More expensive than uncoated glass cloth — only justified where the non-stick surface is genuinely needed.
Attacked by hydrofluoric acid and molten alkali metals (both rare in normal service).
Food-grade coating must be specified explicitly for product contact — standard industrial grade is not certified.

Installation, Storage & Maintenance

Installation

On heat-sealing bars, clean the bar thoroughly and wrap adhesive-backed PTFE tape smoothly, without wrinkles or trapped air — a wrinkle becomes a hot spot and a weak point. On conveyor belts, set the tension correctly: too tight accelerates wear and stresses the joint, too loose lets the belt wander and slip. Seal or hem cut edges to stop the fibreglass base fraying. If the belt is running near its 260 °C limit, confirm the actual belt surface temperature rather than the oven set-point, since they are not always the same.

Storage

Store rolls flat or suspended on a core, dry, and away from sharp objects that could cut or crease the fabric. A hard crease in a PTFE-coated fabric can damage the coating along the fold line. Keep adhesive-backed tape in a cool place with its liner intact until use, as the adhesive can degrade with heat over long periods.

Maintenance

Wipe down with a damp cloth — nothing should be baked onto the surface, which is the whole point of the material, so cleaning should be trivial. If product is starting to stick, that is the diagnostic sign that the PTFE coating has worn through and the glass base is exposed. At that point the fabric has reached the end of its useful life and should be replaced; there is no way to restore the coating in situ. Do not use abrasive pads or scrapers, which will destroy the coating prematurely.

Buying Guide

What to tell us so we quote the right grade first time.

Are you buying it for non-stick, or for heat? Crucial. This fabric is bought for its surface. Its heat ceiling is 260°C. If you need a 400–550°C heat barrier, you want plain glass cloth instead — and you will lose the non-stick property.
Thickness / weight. Thin (0.08–0.13 mm) for sealing bars and release sheets. Medium (0.25 mm) is the general-purpose grade. Heavy (0.5–1.0 mm) for conveyor belts under load and abrasive duty.
Plain roll, adhesive tape, or endless belt? Adhesive-backed for wrapping sealing bars. Made-up endless belt for a conveyor — give us the belt length, width and machine centres.
Is it food contact? If yes, specify the food/FDA-grade coating explicitly. Standard industrial grade is chemically similar but not certified for product contact.
Does air need to pass through it? If you are drying and need airflow through the belt, you want the open-mesh PTFE belt, not this solid coated fabric.
Any static concern? An anti-static (black, conductive) grade is available where static build-up is a problem around powders or sensitive equipment.

Standards & Compliance

Woven E-glass fibreglass base with sintered PTFE coating.
FDA 21 CFR 177.1550 — food-contact compliance for the PTFE coating (applies to certified food-grade fabric only).
Continuous service rated −73°C to +260°C — the limit is set by the PTFE coating.
Available in food-grade, anti-static (conductive black), adhesive-backed and endless-belt forms.
Certificates of conformity and food-grade documentation available on request.

Downloads

Product Datasheet (PDF) Specifications, applications and industries served.

Need a drawing or a specific size? Send your requirement on WhatsApp and we will confirm what is achievable in this material.

Frequently Asked Questions

What temperature can PTFE coated fiberglass fabric handle?

−73°C to +260°C continuously. Importantly, that ceiling is set by the PTFE coating, not the fibreglass — the glass base would take far more heat. It is the coating that degrades first.

Can I use it as a heat barrier at 500°C?

No. Despite the fibreglass in it, its limit is 260°C because of the coating. For 400–550°C you want plain glass cloth — but you will lose the non-stick surface, which is the whole reason to buy the coated fabric.

Why is product starting to stick to my belt?

The PTFE coating has worn through and the fibreglass base is exposed. That is the end of the fabric’s useful life — the coating cannot be restored in situ. Replace it.

Is it food-safe?

Food/FDA-grade coating is available and is widely used on baking and food conveyor belts. But standard industrial grade is not certified for product contact — you must specify food grade explicitly.

What thickness do I need?

Thin (0.08–0.13 mm) for heat-sealing bars and release sheets. Medium (~0.25 mm) is the general-purpose grade. Heavy (0.5–1.0 mm) for conveyor belts carrying load or facing abrasion.

Can I get it as a tape?

Yes — adhesive-backed PTFE fabric tape is one of its most common forms, used for wrapping heat-sealing bars and jaws on packaging machines.

Can you supply it as an endless belt?

Yes. Give us the belt length, width and your machine centres and we will make it up endless (joined) to fit.

What is the difference between this and PTFE mesh belt?

This is a solid coated fabric — air cannot pass through it. The mesh version is an open weave that lets air flow through the belt, which is what drying and curing ovens need. Choose mesh if airflow through the belt matters.

Does it stretch?

No — and this is one of its main advantages. The woven fibreglass base gives it excellent dimensional stability, so a belt does not stretch, wander or lose tracking under tension and heat.

Can it run over small rollers?

Yes. Its flex-fatigue resistance is excellent, which is exactly why it is used on conveyors with small-diameter rollers where a rigid material would crack.

What chemicals attack it?

Almost none, because the exposed surface is PTFE and PTFE is chemically inert across pH 0–14. The exceptions are hydrofluoric acid and molten alkali metals, both rare in normal industry.

How do I clean it?

Wipe with a damp cloth. Cleaning should be easy — that is the point of the material. Do not use abrasive pads or scrapers, which will wear through the coating and destroy the non-stick surface prematurely.

Why is the edge of my belt fraying?

The fibreglass base frays at unsealed cut edges. Edges should be sealed or hemmed on belts. If you cut the fabric yourself, seal the edge.

Is there an anti-static version?

Yes — a black conductive grade is available where static build-up is a concern, for example around powders or static-sensitive equipment.

Will it puncture?

It is a fabric, so yes, sharp objects will cut or puncture it. It is tough and flex-resistant but it is not armour.

Why is it more expensive than plain glass cloth?

Because of the PTFE coating and the sintering process. If you do not actually need the non-stick surface, plain glass cloth is cheaper and takes far more heat — buy the coated fabric only when release matters.

Is it a good electrical insulator?

Yes — PTFE is an excellent dielectric, so the fabric has good electrical insulating properties in addition to its release and heat characteristics.

Does it absorb moisture?

Effectively none. Both the glass and the PTFE are non-absorbent, so it is dimensionally stable in humid conditions.

How long does a PTFE belt last?

It depends entirely on abrasion, tension and temperature. The failure mode is coating wear-through, which shows up as product beginning to stick. Correct tensioning and avoiding abrasive cleaning are the two biggest factors in belt life.

What colour is it?

Standard is brown. A black conductive (anti-static) grade is also available.

PTFE Coated Fiberglass Fabric