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Protek Fire Retardant Threads

Protek® PTFE Coated Fiberglass Threads

Protek PTFE Coated Fiberglass threads stand out as a remarkable innovation, combining the strength and versatility of fiberglass with the unique properties of PTFE (Polytetrafluoroethylene). This combination results in a product that retains 75% of its strength up to 650ºF, softens at 1350ºF and melts between 2050ºF and 2160ºF.


Protek PTFE Coated Fiberglass threads are made by twisting fiberglass yarns and then coating them with PTFE, a synthetic fluoropolymer. This coating process enhances the already impressive attributes of fiberglass, making the threads highly resistant to heat, chemicals, and friction.

Key Features

  • High-Temperature Resistance: PTFE Coated Fiberglass threads can withstand temperatures ranging from -70°C to +260°C (-94°F to +500°F) while retaining 100% strength, making them suitable for use in extreme temperature conditions.
  • Chemical Resistance: These threads are resistant to most chemicals, including acids and alkalis, ensuring durability and longevity in harsh chemical environments.
  • Low Coefficient of Friction: The PTFE coating provides a smooth, non-stick surface, reducing friction and wear on the threads.
  • High Tensile Strength: Fiberglass threads are known for their high tensile strength, which is further enhanced by the PTFE coating, making them robust and durable.
  • UV and Weather Resistance: The threads are resistant to UV radiation and various weather conditions, ensuring their performance is not compromised over time.

Recommended Use

  • Industrial Fabrics: Used in the manufacture of conveyor belts, filtration fabrics, and insulation covers, where high-temperature resistance and durability are crucial.
  • Aerospace and Automotive: Ideal for components that require high strength and resistance to heat and chemicals, such as gaskets and seals.
  • Marine Applications: Used in boat covers, sails, and other marine fabrics due to their resistance to water, UV, and salt.
  • Electrical Insulation: Suitable for electrical insulation applications, thanks to their non-conductive and heat-resistant properties.
  • Protective Clothing: Utilized in the production of fire-resistant and chemical-resistant clothing for industrial safety.





E-12, E-18, E-24


150, 210, 300

Single-End Break

18 lbs, 24 lbs, 30 lbs

Break Strength



Light brown



Yards / lb

2700, 1800, 1300

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