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Protek Fire Retardant Threads

Protek® Bonded Kevlar® Sewing Threads

Protek Bonded Kevlar Sewing Threads are a high-performance, industrial-grade sewing thread, designed for applications where durability and strength are paramount. These threads are made from Kevlar, a synthetic fiber known for its exceptional strength-to-weight ratio, which is five times stronger than steel on an equal weight basis.


The key feature of Protek Bonded Kevlar Sewing Threads is the bonding process, which adds an extra layer of protection and reduces fraying, ensuring the thread maintains its integrity during and after sewing.

Protek Bonded Kevlar Sewing Threads are a top-tier choice for any application that demands superior strength, durability, and resistance to extreme conditions. Whether it’s for protective clothing, heavy-duty equipment, or precision-engineered components, these threads offer reliability and performance that is hard to match.


  • High Tensile Strength: Exceptionally strong, offering superior durability and resistance to breakage.
  • Bonded for Durability: Bonding process enhances thread integrity, reduces fraying, and extends the life of the thread.
  • Flame Resistant: Inherently flame-retardant, ideal for use in fire-resistant applications.
  • Heat Resistant: Capable of withstanding extreme temperatures, suitable for high-temperature environments.
  • Chemical and Abrasion Resistant: Offers excellent resistance to chemicals and abrasion, maintaining performance in harsh conditions.
  • Lightweight: High strength-to-weight ratio, providing robust performance without adding significant weight.
  • Mildew and Aging Resistant: Resists degradation from mildew and aging, ensuring long-term performance in outdoor and marine environments.


  • High-Temperature Environments: Due to Kevlar’s inherent flame resistance and ability to withstand extreme temperatures, these threads are ideal for use in fire-resistant clothing, heat protective gear, and other safety apparel.
  • Heavy-Duty Applications: The exceptional tensile strength of Protek Bonded Kevlar Sewing Threads makes them suitable for use in manufacturing heavy-duty equipment covers, military gear, and ballistic vests where durability is crucial.
  • Outdoor and Marine Applications: These threads exhibit excellent resistance to chemicals, mildew, and aging, making them perfect for outdoor and marine applications, such as sails, tents, and awnings.
  • Aerospace and Automotive Industries: Their high strength-to-weight ratio and resistance to abrasion and chemicals make them an excellent choice for use in aerospace and automotive components.
  • Sporting Goods: Ideal for use in the construction of sports equipment like climbing harnesses, paragliding chutes, and other gear where safety and durability are essential.





B-69, B-138, B-207, B-346


70, 120, 210, 400

Single-End Break

23 lbs, 45 lbs, 81 lbs, 135 lbs

Break Strength



Natural, Black, Custom (upon request)


24 spools per case

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