Aramid Heat Resistant Thread
High-tenacity aramid sewing thread for stitching removable insulation jackets and heat-resistant textiles — ordinary thread burns through at the seams.
- High-tenacity aramid — the same fibre family as Kevlar®
- Does not burn through or degrade at the seam like polyester or cotton thread
- High tensile strength — holds multi-layer jackets together under handling
- Used to sew removable insulation jackets, welding curtains and heat shields
- Supplied on spools in a range of thicknesses
Overview
Aramid heat resistant thread is high-tenacity aramid (the same fibre family as Kevlar®) spun into a sewing thread for stitching heat-resistant textiles and removable insulation jackets. It exists to solve one specific and frequently overlooked problem: an insulation jacket is only as good as its seams.
Ordinary polyester or cotton sewing thread degrades and burns through at the temperatures a valve jacket or furnace curtain actually sees. When that happens, the assembly comes apart at precisely the points holding it together — the stitching — and the jacket fails regardless of how good the insulation inside it is. Aramid thread is what makes the assembly survive in service.
We supply it alongside the fabrics and insulation used to fabricate removable valve and flange jackets, welding curtains, heat shields and high-temperature covers. It was used to sew the multi-layer removable valve jackets we supplied to OGDCL Dakhni.
Specifications
| Material | High-tenacity aramid fibre |
|---|---|
| Form | Sewing thread, spooled |
| Colour | Yellow (natural aramid) |
| Max Temperature | Approx. 250–260°C continuous |
| Tensile Strength | Very high |
| Key Property | Does not burn through at the seam |
| Typical Use | Sewing insulation jackets & heat-resistant textiles |
| Supply | Spools — sizes to order |
Applications
Industries Served
Commonly specified across:
Frequently Asked Questions
Why can I not use ordinary sewing thread for an insulation jacket?
Because it burns through. Polyester and cotton thread degrade at the temperatures a valve jacket sees, and the jacket then comes apart at the seams — the exact points holding it together. Aramid thread is what makes the assembly survive.
Is this the same as Kevlar?
It is the same fibre family. Kevlar® is a well-known brand of aramid fibre. We supply aramid-fibre thread; unless a specific branded fibre is stated on your order, we do not imply supply of that brand.
What temperature does it withstand?
Around 250–260°C continuously, which covers the seam temperatures on typical valve and flange insulation jackets.
What is it used for?
Stitching removable insulation jackets, welding curtains, heat shields and high-temperature covers — anywhere a heat-resistant textile has to be sewn and the seam must survive.
Do you supply the other jacket materials too?
Yes. A removable valve jacket is typically ceramic fibre wool (insulating core), PTFE sheet (barrier layer) and silicone coated fibreglass (outer skin), sewn with this thread. We supply all four.
What sizes is it available in?
Supplied on spools in a range of thicknesses. Tell us the fabric weight you are sewing and we will advise.
Is aramid thread the same as aramid fibre thread?
Yes. Aramid thread, aramid fibre thread and aramid fiber thread all describe sewing thread spun from high-tenacity aramid filament, the same fibre family as Kevlar. Fibre and fiber are the British and American spellings of one word.
Do you supply Aramid Heat Resistant Thread nationwide?
Yes. We are based in Lahore and supply aramid heat resistant thread across Pakistan, including Karachi, Islamabad, Rawalpindi, Faisalabad, Multan, Sialkot and Gujranwala. Delivery is by road freight. Send us the width, thickness and quantity together with your delivery city, and the quote will include freight and lead time.
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