High-Temperature Sewing Threads for Your Insulation Needs

Alec McAllister | February 10, 2021

To get the best thermal protection for your extreme-temperature applications, you don't just need high-quality fabrics with superior thermal qualities, you also need high-temperature sewing threads to hold it all together.

High-temp sewing threads may not be the first thing that comes to mind when you think about industrial-grade thermal protection. But these often overlooked components are critical in the production of a wide range of industrial products. After all, how well would your personal protective equipment or insulation materials hold together in extreme environments if they were stitched together by ordinary threads? Certainly not long enough.

It just makes sense. High-temperature fabrics should always be used in tandem with high-temperature sewing threads. And, at McAllister Mills, we manufacture a variety of high-quality, high-temperature sewing threads able to withstand a range of extreme temperatures, from 500˚F to 2300˚F.

Which sewing threads are best for your application? Depends on where in the high temperature range your industrial application falls.


Aramid Threads for Lower Service Temperature Applications

Our Aramid line of sewing threads is manufactured from spun Kevlar or Nomex fibers to deliver reliable protection up to 500˚F/250˚C. Kevlar and Nomex are known for their fire-retardant and chemical-resistant qualities and both are frequently relied upon in the production of protective clothing and gear. These threads are also perfect for use in heavy-duty clothing, conveyer belts, harnesses, bags and as reinforcement for plastics or other fibers.

In addition to their protective attributes, Kevlar threads are also incredibly strong and lightweight. In fact, their strength-to-weight ratio makes them five times as strong as steel. Nomex threads offer resistance against flexing, chemicals and most hydrocarbons and organic solvents, which makes them suitable for many filtration and insulation products.


Fiberglass Threads for High-Temperature Applications

For applications that feature higher operational temperatures, our fiberglass threads offer protection up to 1000˚F/540˚C. This makes them perfect for many industrial products, including safety spray shields, gaskets and heat shields.

Our high-temperature fiberglass thread line is made from continuous filament fiberglass yarn high-twisted for strength and coated with Teflon for better wear resistance. Formed from silica and aluminum oxides, our E-Glass fiberglass fibers make our threads mechanically resistant, chemically stable, waterproof, and electrically and thermally insulating. The smooth, uniform Teflon coating enhances flexibility and minimizes the possibility of breaking. A variation featuring Inconel wire reinforcement is available for when an additional level of strength is desired.


Alumina Threads for Extreme High-Temperature Applications

Our flame-resistant, high-temperature Alumina threads are made for the maximum level of thermal protection. Ideal for use in insulating pads, fire and furnace curtains and extreme-temperature gaskets and seals, these threads perform reliably in work temperatures up to 2300˚F/1250˚C. Their PTFE coating provides an additional layer of protection and great lubrication during the sewing process.

Made from boron-free continuous filament alumina fibers, Alumina threads stay flexible, with little to no shrinkage, even after prolonged exposure to maximum service temperatures. Designed for the most demanding applications, they stand strong where competing high-temperature threads falter.


McAllister Mills High-Temperature Sewing Threads

At McAllister Mills, we produce and deliver high-temperature sewing threads to support your insulation needs. We can help you design the perfect thread to withstand the demanding requirements of your specific needs. Our team features more than 30 years of experience creating custom high-temperature solutions across many heavy-duty industries.

Not sure which high-temperature thread will do the best job for your application? We'll help you figure it out. Let's talk solutions. Request a consult today.