Name: Glass Tape - Al-Hamd Traders
Price: 2800 PKR
Availability: InStock

Overview

Glass tape is woven E-glass fibreglass in tape form — the straightforward, asbestos-free way to wrap something that gets hot. It withstands around 550 °C, it is non-combustible, it is chemically stable, and it is a good electrical insulator. It is used for lagging hot pipework, wrapping exhaust and steam lines, insulating cables and coils, binding thermal insulation in place, and protecting people and equipment from hot surfaces.

It is the direct replacement for asbestos tape, and for most heat-wrapping duty it does the same job without the handling, disposal and regulatory burden. Where asbestos tape still has an edge is nothing to do with heat — asbestos tape is rated lower, at around 325 °C. Glass tape is actually the higher-temperature material of the two, which surprises people.

Two things glass tape is not. First, it is not a sealing tape — it is a heat barrier. It is not adhesive (unless you order an adhesive-backed grade), and it does not seal pressure. Second, and more importantly, it is not PTFE thread seal tape. People occasionally confuse the two because both are called "tape". If you are trying to seal a threaded pipe joint, you want PTFE Thread Seal Tape, which is a completely different product. Glass tape wrapped around a thread will do nothing useful.

Specifications

Typical properties for woven E-glass fibreglass tape. Width, thickness and weave vary by grade — tell us the application and we will match it.

Property	Value	Test Standard
Material	Woven E-glass fibreglass	—
Max Temperature	~550°C	—
Combustibility	Non-combustible	—
Asbestos Content	None	—
Standard Widths	12 mm, 19 mm, 25 mm, 50 mm, 75 mm, 100 mm	—
Standard Thicknesses	~0.4 mm – 3 mm (grade-dependent)	—
Tensile Strength	High — will not tear easily under tension	—
Electrical Insulation	Good dielectric properties	—
Chemical Resistance	Good — resists most acids, oils, solvents	—
Attacked By	Hydrofluoric acid, hot phosphoric acid, strong alkalis	—
Moisture Absorption	Low	—
Adhesive	None as standard — adhesive-backed grade to order	—
Colour	White / off-white (natural glass)	—
Supply Form	Rolls, by width and length	—
Sealing Function	None — this is a heat barrier, not a seal	—
Related Products	Glass Cloth (sheet form), Glass Rope (cord form)	—

Properties in Detail

Thermal Properties

Max Temperature: ~550°C
Combustibility: Non-combustible
vs Asbestos Tape: Higher (asbestos tape: ~325°C)
vs PTFE Fabric: Higher (PTFE coating limits that to 260°C)
Thermal Shock: Good

Mechanical & Electrical

Tensile Strength: High
Electrical Insulation: Good dielectric
Moisture Absorption: Low
Abrasion Resistance: Fair — coated grades do better
Flexibility: Good — conforms to pipes and irregular shapes

What It Is NOT

A Sealing Tape: No — it does not seal pressure
PTFE Thread Tape: No — a completely different product
Self-Adhesive: Not as standard (adhesive grade to order)
For >550°C: No — use ceramic fibre products

Manufacturing

Glass tape is woven from continuous E-glass fibreglass yarn. E-glass is the standard electrical-grade glass formulation, chosen for its combination of good heat resistance, high tensile strength, chemical stability and genuinely good dielectric properties — which is why the same base material serves both heat-shielding and electrical-insulation duties.

The weave determines the character. A tight, heavy weave gives a dense, strong tape with better abrasion resistance for lagging and binding work; a lighter, more open weave gives a thinner and more flexible tape that conforms closely to complex shapes and small-diameter pipes. Thickness and width are chosen to suit the job.

The same woven E-glass is supplied in three forms across our range: as tape (narrow, for wrapping and binding), as glass cloth (wide sheet, for covers, curtains and blankets), and as glass rope (round or square cord, for packing gaps, sealing furnace doors and filling joints). Choose the form that fits the geometry of the job.

Widths & Typical Uses

Tape is chosen by width for the job. Narrow tape wraps small pipes and cables tightly; wide tape lags larger pipework and covers surfaces with fewer passes.

Width	Typical Use
12 mm	Cable and coil insulation, small-diameter wrapping
19 mm	Small pipes, electrical binding, tight radii
25 mm	General purpose — the most common width
50 mm	Pipe lagging, exhaust wrapping, general heat shielding
75 mm	Larger pipework, faster coverage
100 mm	Large pipe and duct lagging, wide coverage

Also available as Glass Cloth (wide sheet, for covers and blankets) and Glass Rope (cord, for packing gaps and sealing furnace doors). Adhesive-backed tape available to order. Tell us the width, thickness and length you need.

Chemical Resistance

E-glass is chemically stable against most industrial media. It shares the same three specific weaknesses as all glass fibre products.

Medium	Resistance	Notes
Hot Air & Flue Gases	Excellent	Standard lagging and exhaust duty
Steam	Good	Suitable
Mineral Oils & Fuels	Excellent	Unaffected
Solvents	Excellent	Unaffected
Most Acids	Good	Generally resistant
Water	Good	Low absorption
Hydrofluoric Acid	Poor	Dissolves glass — never use
Hot Phosphoric Acid	Poor	Attacks glass fibre
Strong Alkalis / Caustic	Poor	Attacks glass fibre

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

Wrapping, lagging, binding and insulating anything that gets hot — up to about 550°C.

Hot Pipe & Exhaust Lagging Wrapping steam lines, exhaust pipes, manifolds and hot process pipework — cutting heat loss and, just as importantly, protecting people from burns on hot surfaces.

Electrical Cable & Coil Insulation E-glass is a genuinely good dielectric as well as heat resistant, so the same tape insulates cables, coils, transformers and windings in hot electrical equipment.

Binding Thermal Insulation Holding ceramic fibre or glass wool insulation in place on pipes, vessels and ducting while the outer cladding goes on.

Heat Shielding & Protection Protecting hoses, cables and components that run close to a hot surface, and shielding equipment from radiant heat.

Furnace & Oven Door Sealing Packing and sealing gaps around furnace and oven doors. For a thicker gap, Glass Rope is usually the better form factor.

Welding & Hot Work Protection Protecting surfaces, cables and hoses near welding and cutting operations from sparks and radiant heat.

Industries

Why Glass Tape is specified in each of the industries we serve.

Power Plants

A boiler house is full of hot pipework, and every uninsulated hot surface is both an energy loss and a burn hazard for anyone working around it. Glass tape is the practical, cheap way to lag steam lines, exhaust runs and headers, and to bind bulk insulation in place while the cladding goes on. Its dual character is genuinely useful here: because E-glass is a good dielectric as well as being heat resistant, the same tape is used to insulate cables and coils in hot electrical equipment. Its ceiling of around 550 °C covers most steam-side pipework comfortably. For the genuinely extreme areas — furnace linings, superheater zones running well beyond that — ceramic fibre products are the correct answer, and glass tape is not a substitute.

Steel Mills & Foundries

Around furnaces and casting operations, cables, hoses and instruments have to run close to very hot surfaces and be protected from radiant heat and spatter. Glass tape wrapped around them is the standard, inexpensive protection, and it is non-combustible so it will not itself become a fire risk. It is also used to bind insulation onto hot ducting and to seal gaps around furnace and oven doors. The limitation to respect in a foundry is that glass tape is not a molten-metal splash material: for direct splash exposure you need vermiculite-coated silica cloth, which is specifically rated for that and takes far more heat. Glass tape protects against radiant heat and general hot-surface contact, not against molten metal.

Chemical & Process Plants

Glass tape lags hot process lines, jacketed pipework and steam tracing throughout a process plant, and its chemical stability means the tape itself is unaffected by most of the oils, solvents and acids it might be splashed with. It is also non-combustible, which matters in plants with fire-safety requirements. The chemical caution is specific and worth knowing: like all glass fibre products, it is attacked by hydrofluoric acid, hot phosphoric acid and strong alkalis — HF dissolves glass outright. In areas where those are present, glass-based products are the wrong choice regardless of the temperature rating, and the material selection has to be made on chemistry first.

General Engineering & Automotive

Exhaust wrapping is one of the most common uses of glass tape in general engineering and automotive work — wrapping manifolds and exhaust runs to keep heat in the pipe, protect nearby components and hoses, and reduce under-bonnet or engine-room temperature. Its high tensile strength means it can be pulled tight as it is wrapped without tearing, and it conforms well around bends and complex shapes. In workshops it also serves as general heat shielding around welding and cutting operations. It is cheap, it is non-combustible, and it is the sensible first choice any time something needs to be wrapped against heat below 550 °C.

Glass Tape vs Related Heat Products

Choose on form factor and temperature. Glass tape is the cheap, general heat-wrapping workhorse.

Property	Glass Tape	Asbestos Tape	Ceramic Fiber Tape	PTFE Thread Tape
Max Temperature	~550°C	~325°C	~1260°C class	260°C
Asbestos-Free	Yes	No	Yes	Yes
Purpose	Heat wrapping / lagging	Heat wrapping	Extreme heat	Sealing pipe threads
Seals Pressure	No	No	No	Yes — that is its job
Electrical Insulation	Good	Fair	Good	Excellent
Relative Cost	Low	Low	High	Low
Choose It For	General heat wrapping <550°C	Legacy replacement only	Furnace-grade heat	Threaded pipe joints

Advantages & Limitations

Advantages

Heat resistant to around 550°C — higher than asbestos tape, and higher than PTFE-coated fabric.
Asbestos-free: no handling, disposal or regulatory burden.
Non-combustible.
Good electrical insulation (dielectric) properties as well as heat resistance.
High tensile strength — can be pulled tight while wrapping without tearing.
Chemically stable against most acids, oils and solvents.
Flexible — conforms well to pipes, bends and irregular shapes.
Inexpensive, and available in a wide range of widths.

Limitations

It is a heat barrier, not a sealing tape. It is not adhesive as standard, and it does not seal pressure.
It is NOT PTFE thread seal tape. If you are sealing a threaded pipe joint, you need PTFE Thread Seal Tape — a completely different product. Glass tape will do nothing on a thread.
Ceiling of around 550°C — above this you need ceramic fibre products.
Attacked by hydrofluoric acid, hot phosphoric acid and strong alkalis (HF dissolves glass).
Not a molten-metal splash material — for foundry splash protection use vermiculite-coated silica cloth.
Glass fibres irritate skin, eyes and airways. Wear gloves, eye protection and a dust mask when handling and cutting.
Only fair abrasion resistance in its plain form.

Installation, Storage & Maintenance

Installation

Wrap with a 50% overlap on each pass for continuous coverage — a single-thickness wrap with gaps leaves hot spots and defeats the purpose. Pull the tape firmly as you wrap; its high tensile strength means it can take real tension, and a loosely wrapped tape will slip and unravel in service. Secure the end with a stainless steel tie, clip or wire — not with a plastic tie, which will melt. Wear gloves: glass fibres are irritating to skin, and the cut edges of the tape in particular will get into your hands.

Storage

Store rolls dry, in their packaging, off the floor and away from oils and solvents. Glass tape is chemically stable and does not age or degrade in storage, so shelf life is effectively indefinite provided it stays clean and dry. Keep it away from strong alkalis and acids in the store.

Maintenance

Inspect wrapped pipework periodically for tape that has slipped, unravelled or been damaged, and re-wrap those sections — a gap in the lagging is a hot spot and a burn hazard. Glass tape itself does not degrade chemically in normal service. If the tape has been contaminated by oil, it will still function as a heat barrier but may smoke on first heating.

Buying Guide

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

Are you sealing a pipe thread? If so, this is the wrong product entirely — you want PTFE Thread Seal Tape. Glass tape is a heat barrier and does not seal. This is the single most common mix-up.
What is the temperature? Glass tape covers up to about 550°C. Above that you need ceramic fibre products; there is no glass grade that will survive furnace temperatures.
What width do you need? 12–19 mm for cables and small pipes; 25 mm is the general-purpose width; 50–100 mm for lagging larger pipework quickly.
Tape, cloth, or rope? Tape for wrapping and binding. Glass Cloth (wide sheet) for covers, curtains and blankets. Glass Rope (cord) for packing gaps and sealing furnace doors. Same material, three form factors.
Do you need it adhesive-backed? Standard glass tape is not adhesive. An adhesive-backed grade is available to order if you need it to stay put without being tied off.
Is there any molten metal splash risk? If yes, glass tape is not the right material — you need vermiculite-coated silica cloth, which is rated for splash and takes far more heat.

Standards & Compliance

Woven E-glass fibreglass construction — the standard electrical-grade glass formulation.
Contains no asbestos — a direct replacement for asbestos tape in heat-wrapping duty.
Non-combustible.
Available in widths from 12 mm to 100 mm; adhesive-backed grade to order.
Handling note: glass fibres irritate skin, eyes and the respiratory tract. Gloves, eye protection and a dust mask should be worn when handling and cutting.
Certificates of conformity 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 glass tape handle?

Around 550°C. That is actually higher than asbestos tape (~325°C) and higher than PTFE-coated fabric (260°C), which surprises people.

Is glass tape the same as PTFE thread seal tape?

No — completely different products. Glass tape is a heat barrier for wrapping hot pipes. PTFE thread seal tape seals threaded pipe joints against pressure. If you are sealing a thread, you want PTFE Thread Seal Tape. Glass tape on a thread does nothing.

Can glass tape seal a leak?

No. It is not a sealing product — it does not seal pressure and it is not adhesive as standard. It is purely a heat barrier and binding tape.

Is glass tape self-adhesive?

Not as standard — it is a plain woven tape that you wrap and tie off. An adhesive-backed grade is available to order if you need it.

Is it better than asbestos tape?

For heat, yes — glass tape handles around 550°C versus about 325°C for asbestos tape. And it is asbestos-free, so there is no handling or disposal burden. There is very little reason to choose asbestos tape over it.

How should I wrap it?

With a 50% overlap on each pass, pulled firmly. A single-thickness wrap with gaps leaves hot spots. Secure the end with a stainless steel tie or wire — never a plastic tie, which will melt.

What width should I use?

12–19 mm for cables and small-diameter pipes. 25 mm is the general-purpose width. 50–100 mm for lagging larger pipework with fewer passes.

What is the difference between glass tape, glass cloth and glass rope?

Same E-glass material, three form factors. Tape is narrow, for wrapping and binding. Cloth is a wide sheet, for covers, curtains and blankets. Rope is a cord, for packing gaps and sealing furnace doors. Choose the form that fits the geometry.

Can it be used for electrical insulation?

Yes — E-glass is a genuinely good dielectric as well as heat resistant, so glass tape is widely used to insulate cables, coils and windings in hot electrical equipment.

Does it irritate the skin?

Yes — glass fibres irritate skin, eyes and airways, and the cut edges in particular will get into your hands. Wear gloves, eye protection and a dust mask when handling and cutting it.

Which chemicals attack glass tape?

Hydrofluoric acid (which dissolves glass outright), hot phosphoric acid, and strong alkalis. It resists most other acids, oils and solvents well.

Can I use it for molten metal splash protection?

No. For direct molten-metal splash you need vermiculite-coated silica cloth, which is specifically rated for splash and handles around 1000°C. Glass tape protects against radiant heat, not molten metal.

What do I use above 550°C?

Ceramic fibre products. There is no glass fibre grade that survives furnace temperatures — glass tape has a hard ceiling.

Is it non-combustible?

Yes. Glass fibre will not burn or support a flame.

How do I secure the end of the wrap?

With a stainless steel tie, clip or wire. Do not use a plastic cable tie — it will melt at the temperatures this tape is used at.

Does glass tape degrade over time?

No — it is chemically stable and does not age. Shelf life is effectively indefinite if stored dry and clean. In service, its failure mode is mechanical (slipping, unravelling, physical damage), not chemical.

Can it be used outdoors?

Yes — it is unaffected by UV and weathering. Bear in mind it absorbs some moisture over time, though this does not damage it.

What is E-glass?

The standard electrical-grade glass fibre formulation, chosen for its combination of heat resistance, high tensile strength, chemical stability and good dielectric properties. It is the same base material used in glass cloth and glass rope.

Can I use it to hold insulation in place?

Yes — that is one of its main uses. It binds ceramic fibre or glass wool onto pipes and vessels while the outer cladding is fitted, and it survives the same temperatures the insulation does.

How long does a wrap last?

Indefinitely in principle, since the material does not degrade. In practice it lasts until it is physically damaged, slips, or unravels — so wrapping it correctly with proper overlap and tension is what determines service life.

Glass Tape