Shrink-N-Shield® (4:1)

A heat-shrink tubing that provides exceptional shielding from EMI, RFI and EMF, and has a 4:1 shrink ratio.

Drawing Number(s): ZT99-18-001, ZT16-18-002

Shrink-N-Shield® (4:1)
RoHS Military Grade

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Selected Part Number:ZT99-18-001-0.75-B-X48.0
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Shrink-N-Shield® (4:1)
  • This product provide an easy, one-step installation and provides a lower total installed cost
  • Shrink-N-Shield (4:1) EMI shielding material offers better shielding effectiveness of 65 db from 10MHz to 10GHz
  • Excellent anti abrasive, environmental, chemical, and electrical properties with resistance to most oils and fluids, mild acids, and alkalis

Shrink-N-Shield® (4:1) is an EMI shielding heat-shrink tubing that can be cut to length for versatile application uses. The flame-retardant and self-extinguishing polyolefin sleeve can withstand temperatures up to 275°F (135°C). Additionally, the jacketing has excellent abrasion, chemical, fluid and fungus resistance.

Shrink-N-Shield® (4:1) comes standard with the Z-3250 shielding cloth. However, other EMI-shielding cloths are available upon request.

The Z-3250 shielding cloth is made of a taffeta fabric plated with copper and nickel for excellent corrosion protection. The lightweight, flexible shielding cloth will not flake or deteriorate over time, so you can be confident your components will have long-lasting protection against EMI, RFI, and EMF.

Shrink-N-Shield® (4:1) is offered in diameters from 0.75” to 2” with custom sizes available upon request, and has an operational temperature range of -40°F to 275°F (-40°C to 121°C).

If you require a 2:1 or 3:1 shrink ratio, Zippertubing® offers Shrink-N-Shield (2:1) and Shrink-N-Shield (3:1), and if you have components with diameters as small as 0.015”, Shrink-N-Shield (Nano) is also available for your EMI shielding heat-shrink needs.

If your application is more suited to a wrap-around heat shrink for ease of installation, PRT® (S-3250) and PRT® (S-7200) are the solutions. Both standard products offer EMI shielding and can easily wrap around your wires or cables, rather than having to pull them through. If required, other EMI-shielding fabrics are available for PRT® upon request.

*Class III polyolefin heat-shrink tubing is available upon request.



Overall Performance

  • Diameter - Before Shrink: 0.75" (3/4)
  • Material: Polyolefin
  • Heat Shrink Material: Cross-Linked Polyolefin
  • Maximum Operating Temperature: 275°F
  • Minimum Operating Temperature: -67°F
  • RoHS: RoHS-10
  • Shelf-Life: 60 months
  • Shield Bonding: Nitrile Adhesive
  • Shielding: Z-3250
  • Shielding Material: Nickel Plated Copper
  • Shrink Ratio: 4:1


  • Mil-Spec: SAE-AMS-DTL-23053/5
  • REACH: Compliant
  • Dielectric Strength: 500 volt/mil
  • Elongation: 200% (after shrink)
  • Flammability: UL224, VW-1, Self-extinguishing
  • Fungicide: No Growth
  • Longitudinal Shrinkage: +/-5% (after heat recovery)
  • Thickness: 0.035" - 0.055"
  • Maximum Operating Temperature: 275°F
  • Minimum Operating Temperature: -67°F
  • RoHS: RoHS-10
  • Shelf Life: 60 Months
  • Shrink Ratio: 2:1, 3:1 or 4:1
  • Tensile Strength: 1500 psi. (after shrink)
  • Specific Gravity: 1.35 (max.)


  • Base Fabric: Polyester Taffeta Fabric
  • Surface Resistivity: <0.1 ohms/sq
  • REACH: Compliant
  • Elongation: 27%
  • Material: Cloth
  • Thickness: 0.004"
  • Maximum Operating Temperature: 250°F
  • Minimum Operating Temperature: -40°F
  • RoHS: RoHS-10
  • Shelf Life: 60 Months
  • Shielding: Z-3250
  • Tensile Strength: 74-79 lbs/in
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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PRT® Shrink-N-Repair® (M) PRT® (ES-135)
DESCRIPTION A wrap-around heat shrink made from MIL-SPEC tubing that repairs electrical systems and assembled components and is resistant to abrasion and chemicals. A wrap-around, abrasion-resistant, fluid-resistant heat shrink that repairs wires or cables with diameters up to 0.5”. A wrap-around, military-grade heat shrink paired with a high-temperature water blocking, hot-melt adhesive that protects against harsh environmental conditions.
Closure Tape (Specialty Surface) Tape (Specialty Surface) Tape (Specialty Surface)
RoHS RoHS-10 RoHS-10 RoHS-10
Abrasion Resistance Best Best Best
Installation Type Wrap-Around Wrap-Around Wrap-Around
Purpose Wire Repair Wire Repair Water Blocking
Min Temperature Extreme Moderate Extreme
Minimum Operating Temperature -67°F -67°F -67°F
Max Temperature Moderate Low Moderate
Maximum Operating Temperature 275°F 275°F 275°F
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