ZTT® (ALP-500)

A strong, pull-through thermal barrier sleeve that protects components inside from continuous temperatures up to 350°F, and radiant temperatures up to 1,200°F.

Drawing Number(s): ZT17-09-005

ZTT® (ALP-500)

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Selected Part Number:ZT17-09-005-1.0
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ZTT® (ALP-500)
  • Pull-through sleeve provides complete protection of components inside
  • ALP-500 heat reflective material is strong and durable
  • MIL-SPEC Kevlar thread is lock-stitched for secure, lasting closure

ZTT® (ALP-500) is a pull-through heat shielding solution that provides complete 360-degree protection and offers better flexibility. The ALP-500 thermal material is a fiberglass cloth that is coated on one side with polyurethane and the other side with a reflective aluminum. This heat shielding material is only 0.016” thick but can shield from radiant temperatures up to 1,200°F. The ALP-500 is also non-flammable and best in abrasion resistance.

ZTT® (ALP-500) utilizes a strong Kevlar thread that is military grade with meeting MIL-T-44100. The thread is sewn in a lock-stitch form to ensure no fraying and provides a resilient, lasting closure. The Kevlar thread is extremely durable with having resistance to bacteria, mildew, abrasion, and aging. The solution is inversely sewn into a teardrop shape that provides a clean appearance and reduces abrasion damage during installation. ZTT® (ALP-500) can also be sewn in a traditional teardrop style upon request.

ZTT® (ALP-500) is offered in diameters ranging from 1.0” to 3”, with custom shapes and sizes available upon request. The continuous operational temperature range is -58°F to 350°F (-50°C to 177°C), with a radiant temperature range of up to 1,200°F.


Overall Performance

  • Diameter: 1.0"
  • Closure: Kevlar Thread
  • Material: ALP-500
  • Maximum Operating Temperature: 350°F
  • Minimum Operating Temperature: -50°F
  • RoHS: RoHS-10
  • Shelf-Life: 60 months


  • REACH: Compliant
  • Flammability: Self-extinguishing
  • Thickness: 0.017"
  • Thickness Variance: +/- 15%
  • Maximum Operating Temperature: 350°F
  • Minimum Operating Temperature: -58°F
  • RoHS: RoHS-11
  • Shelf Life: 60 Months
  • Tear Strength: >350 daN/50 mm (warp) | >250 daN/50 mm (fill)

Kevlar Thread

  • Mil-Spec: A-A-55195
  • Break Strength: 16 lbs-min
  • REACH: Compliant
  • Closure: Sewn
  • Elongation: 6% (max)
  • Flame Retardant: Decomposes at 838°F
  • Material: Kevlar Thread
  • Material: Spun para-Aramid filaments
  • Minimum Operating Temperature: 410°F
  • RoHS: RoHS-10
  • Shelf Life: 60 Months
Specifications subject to change without notice. All statements and technical information contained herein are based on tests we believe to be reliable, but the accuracy or completeness is not guaranteed under all circumstances. Before using Zippertubing® products, the user shall determine suitability for the intended use, and user assumes all responsibility for improper selection. Published attenuation values of Zippertubing® shielding have been verified by laboratory testing of the respective shielding materials. Actual installed attenuation values may differ due to installation techniques and final assembly operation parameters which are beyond the control of Zippertubing®. Actual attenuation values can only be determined by the end user testing the completed assembly. U.S. and International Patents and patents pending. © The Zippertubing® Company, Chandler, Arizona.

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DESCRIPTION A pull-through, flexible heat shielding sleeve that protects components from continuous temperatures as high as 1,022°F. An all-in-one, wrap-around solution combining the heat shielding of the ALHTG-65 with the EMI shielding of the knitted SHX-4 mesh and a brass zipper. A heat shielding solution that features stainless-steel snaps and a silicone, polymer-coated fiberglass jacketing that protects from temperatures up to 464°F.
Closure Stainless Steel Reinforced Kevlar Thread Toothed Zipper (High-Temp Brass) Stainless Steel Snaps
RoHS RoHS-10
Abrasion Resistance Good Good
Installation Type Pull-Through Wrap-Around
Purpose Sleeve EMI Shielding
Min Temperature Extreme Moderate Extreme
Minimum Operating Temperature -58°F -32°F -58°F
Max Temperature Extreme Moderate
Maximum Operating Temperature 1022°F 399°F 464°F
Flexibility Better
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