ISO/TS 16949 ISO 9001


| 7150 W. Erie St. |

Chandler AZ 85226


P: (480) 285-3990

T: (855) 289-1874

ZT-Shield® (3250)

EMI Shielding Tape, Polyurethane and Ni/Cu/Polyester Shield

ZT-Shield® (3250) is a combination of fire retardant Polyurethane ZT-Tape® stagger bonded to a layer of Z-3250-CN shielding fabric with an electrically conductive adhesive backing. When spirally wrapped around electrical wires or other items using a 50% overlap technique, this product will provide a finished installation with excellent electromagnetic shielding characteristics. This product features a shield coverage of 98 percent and a flame-retardant Polyurethane insulation jacket with good dielectric strength.

This tape eliminates the need to go back over a shielded assembly a second time to apply a protective dielectric insulator. ZT-Shield® (3250) also referred to as Shielded ZT-Tape® is available in multiple widths to accommodate most wire harness diameters.

This product has an operational temperature range of -50° to 80°C (-58° to 176°F).

Product Specifications

RoHS Compliant
Shelf-Life 12 months
Shape of Installation ALL
Tape Width 1.5" Wide 2.0" Wide Custom Size
Unit Length 25 ft. Roll
Exterior Material ZT-Tape
Shielding Z-3250-CN
Closure Adhesive Backed

Material Specifications


Base Fabric Polyester Taffeta Fabric
Coating Nickel Over Copper
Elongation 27%
Material Thickness 0.004"
RoHS Compliant
Shelf-Life 60 months
Temperature Range -40° to 121°C (-40° to 249.8°F)
Surface Resistivity <0.1 ohms/sq
Tensile Strength 74-79 lbs/in
Shielding Effectiveness Better

Tape (Electrically Conductive)

Adhesion (24hr.) 55 oz/in. (to steel)
Adhesive Acrylic
Color Translucent
Electrical: AC Impedence .044 ohms (500 Hz - 100 KHz)
Electrical: Current Capacity 1 Amp/sq-in
Electrical: Resistance <.049 ohms (1.0 sq-in)
Flammability Fire Retardant
Material Thickness 0.002"
Particles Silver coated Nickel
Release Liner Polycoated Paper Liner
RoHS Compliant
Shelf-Life 12 months, unbonded (Zippertubing)
Solvent Resistance Poor (soften & swell and is removable with chlorinated & aromatic solvents and Ketones)
Temperature Range 70°C Days/Weeks 121°C Minutes/Hours

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. © 2018 The Zippertubing® Company, Chandler, Arizona.