Secondary Flame-Resistant Protection


  Just launched – Tyvek® 400 SFR​


  • <span style="color: #e4001c">NEW </span>Tyvek&reg; 400 SFR
  • What is secondary FR?
  • SFR Fabrics
  • Resources

NEW DuPont™ Tyvek® 400 SFR​

The protection, durability and comfort of Tyvek®, now with secondary flame resistance​


Tyvek® 400 SFR garments provide secondary flame resistance when worn over appropriate primary flame-resistant (FR) protective clothing​
Tyvek® 400 SFR garments are designed to be worn over primary FR garments​
Tyvek® 400 SFR garments are self-extinguishing and will not continue to burn, melt, or drip once the fire exposure ends

Tyvek® 400 SFR garments provide an inherent barrier against particles (down to 1.0 micron in size)
Tyvek® 400 SFR garments are strong, yet lightweight and soft​
Tyvek® 400 SFR garments offer an ideal balance of protection, durability and comfort​



Uses & Applications

Oil & gas
General manufacturing

Dirty jobs
Environmental services

A new generation of single-use secondary flame-resistant garment technology​


Garment Details

  • Patent-pending

  • Red detailing includes red external stitched seams, red zipper and red chest patch border

  • Relaxed fit coverall design features a diamond gusset crotch to allow for unrestricted movement

  • Available in hooded and non-hooded options
Explore Tyvek® 400 SFR

What is secondary FR?

There are two categories of flame-resistant (FR) garments sold for industrial applications: primary FR garments and secondary FR garments (SFR).  Each category is designed to perform different tasks.  Secondary flame-resistant garments (like Tyvek® 400 SFR and Tychem® 2000 SFR ) should not be worn without primary flame-resistant garments underneath.  The common industry definitions, according to industry standards, are as follows:​

  • Primary flame-resistant protective clothing:  Protective clothing that is engineered for the primary purpose to provide protection to the wearer from flame and thermal hazards.​

  • Secondary flame-resistant protective clothing:  Protective clothing that is designed to be worn over primary flame-resistant protective clothing without negatively impacting the burn injury protection levels of the primary flame-resistant protective clothing.​ Secondary FR garments should respond to a fire in a way that doesn’t negatively impact the performance of the primary FR garment when worn as an ensemble.  Secondary FR garments should not continue to burn, melt, or drip once the fire exposure ends.​

SFR Fabrics​

When selecting a secondary flame-resistant (SFR) protective garment, it is important to examine both the flame-resistant (FR) requirements and perform a hazard assessment for hazardous and nonhazardous particles, liquids, or chemicals. Please visit DuPont™ SafeSPEC™ to learn more about Tyvek® 400 SFR and Tychem® 2000 SFR garments and the specified hazards they help protect against.