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Flame Retardant Fabrics for Fire Curtains and Fire Containment Systems

Z-Block™ flame retardant fabrics are high temperature polymer coated fiberglass fabrics treated with a proprietary formulation of fire retardants and finished with a high temperature silicone overcoat (SOC). Z-Block™ offers exceptional resistance to fire, smoke, abrasion, UV, and adverse weather. Z-Block™ is formulated with inorganic materials and will not produce hazardous outgassing.

Z-Block™ flame retardant fabrics are designed for use in fire curtains, fire containment covers, and custom smoke and fire protection systems. When exposed to flame in these applications, the coating develops a protective high temperature silica layer that prevents flame penetration at temperatures up to 1800°F / 980°C.

Z-Block™ is also an excellent insulation jacketing material for multi-layer insulation blankets, but it is not intended for hot-side applications where contact temperatures exceed 350°F / 175°C. 

The Z-Block™ coating can also be applied to some of Newtex’s Zetex® Steel Wire Reinforced Fabrics. These fabrics are woven with stainless steel wire to create a stronger flame retardant fabric with superior abrasion and puncture resistance. Wire reinforced Z-Block™ is ideal for fabricating insulation covers such as blankets and other jacketing that will be subject to vibration, abrasion, or repetitive movement.

Some Z-Block fabrics can be modified for Berry Amendment compliance. Please notify our sales team if you require Berry-compliant materials.

Only need a couple of yards? Z-Block F-407 SOC is available in 2-yard rolls on Amazon Prime.


Z-Block Fire & Smoke has been tested to the following standards:

  • ASTM D6413: Vertical Flame Resistance
  • ASTM E-84: Surface Flame Spread & Smoke Density Testing
  • ASTM F955: Molten Metal Splash Testing
  • FAR 25, Appendix F, Part III & IV: Flame Penetration Resistance & Heat Release Rate
  • BSS 7239: Toxicity of Products Combustion Testing

Common Applications

  • Static and automatic fire and smoke curtains
  • Fire containment covers (FCC's) for palletized cargo
  • Fire containment bags for personal electronic devices (PED's)
  • Fire resistant covers for roofs and buildings
  • Custom fire protection for heavy equipment
  • Custom removable insulation pads and blankets

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Product Image for Item #1100309

Z-Block F-407 60” SOC

  • Item: 1100309
  • Weight: 15.00 oz/sq yd509 g/sq m
  • Thickness: 15 mils0.38 mm
  • Length: 50.00 yards45.72 m
  • Style: F-407
  • Width: 60.00 in152.00 cm
  • Operating Temp: 1800 °F980 °C
  • Ends X Picks: 48 x 32
Product Image for Item #1100365

Z-Block F-824 60” SOC

  • Item: 1100365
  • Weight: 33.00 oz/sq yd1119 g/sq m
  • Thickness: 38 mils0.97 mm
  • Length: 50.00 yards45.72 m
  • Style: F-824
  • Width: 60.00 in152.00 cm
  • Operating Temp: 1800 °F980 °C
  • Ends X Picks: 44 x 35