ISO/TS 16949 ISO 9001

7150 W. Erie St, Chandler, AZ 85226, USA

(855) 289-1874



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PRT® (ES-135)

Our proven PRT® heat shrink wrap with additional hot-melt, water-blocking adhesive (up to 275°F)

This product combines the proven characteristics of two products, our PRT® wrap-around heat shrink tubing and our water-blocking, hot-melt adhesive Z-Block® (135). Together, these two products provide one of the best ways to fix an in-service repair, and offer complete 360° protection against anything that the environment may throw at it.

Z-Block® is a water-blocking, heat shrink electrical tape that is specifically engineered to environmentally seal your wires or cables. The product is comprised of a non-corrosive polyamide, high-flow, hot-melt adhesive that is simply melted by using a standard heat gun.

PRT® is made from MIL-SPEC polyolefin heat shrink tubing that is flame-retardant, RoHS-compliant, and UL-rated. This product is a wrap-around heat shrink that provides a means of repairing in-service, pre-installed applications where wires or cables may be damaged. It can be used as a secondary protection installation for applications that require additional protection.

PRT® (ES-135) has an operational temperature range of -55° to 135° C, and the product is available in 50-ft. rolls and a variety of diameters.

Either of these products is available as a stand-alone product. If you do not see your application’s needs in a solution, feel free to contact us. We would be happy to engineer a specific solution that will fit your needs.

Product Specifications

RoHS Compliant
Shelf Life 24 months
Minimum Operating Temperature -67 ° F (-55 ° C )
Maximum Operating Temperature 275 ° F (135 ° C )

Available Attributes
Please call us at (855) 289-1874 for any custom needs. We have a solution for you!

Shape of Installation Round
Cable Diameter - After Shrinkage 0.040" - 0.075" (#01) 0.076" - 0.125" (#03) 0.126" - 0.174" (#05) 0.175" - 0.250" (#07) 0.25" - 0.37" (#09) 0.38" - 0.49" (#11) 0.50" - 0.62" (#13) 0.63" - 0.74" (#15) 0.75" - 0.87" (#17) 0.88" - 0.99" (#19) 1.0" - 1.12" (#21) 1.13" - 1.24" (#23) 1.25" - 1.37" (#25) 1.38" - 1.49" (#27) 1.50" - 1.62" (#29) 1.63" - 1.74" (#31) 1.75" - 1.87" (#33)
Unit Length 50 ft. Roll
Exterior Material Polyolefin Heat Shrink
Closure Adhesive
Environmental Seal Z-Block-135

Material Specifications


Mil-Spec SAE-AMS-DTL-23053/5
Shelf-Life 24 months
Fluid Resistance Excellent
Fungicide No Growth
Material Thickness 0.035" - 0.055"
Material Cross-linked Polyolefin
Shrink Temperature 90° to 121°C (194° to 250°F)
Longitudinal Shrinkage +/-5% (after heat recovery)
Tensile Strength 1500 psi. (after shrink)
Elongation 200% (after shrink)
Dielectric Strength 500v/mil (after shrink)
Flammability Self-extinguishing
RoHS Compliant
Temperature Range -55° to 135°C (-67° to 275°F)
Abrasion Resistance Best

Tape (Specialty Surface)

Adhesive Acrylic (fiber reinforced)
Material Thickness 0.005"
Release Liner Polycoated Paper Liner
Color Clear
Adhesion (72 hr) 140 oz-in. (to steel) 136 oz-in. (to Polyproylene)
Temperature -40° to +93°C Days/Weeks 149°C Minutes/Hours
Shear Strength >200 grams @ 200 C (1/2" overlap)
Solvent Resistance Excellent
U.V. Resistance Excellent
Humidity Resistance Excellent
Shelf-Life 12 months, unbonded (Zippertubing)
RoHS Compliant

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 suitabilituriy 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.