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SELECTING HEAT SHRINK TUBING … Which Tubing Material To Use?

Call or E-mail Insultab’s Friendly, Knowledgeable Customer Service Department for Assistance
(800) 468-4822 or Read the Information Below.

In selecting the best type of tubing for your application, the critical factor is the ENVIRONMENT.


Underwriter’s Laboratories (UL) operates a testing and accreditation service for electrical and electronic materials and equipment. VW-1 is a flammability test conducted by UL or CSA (Canadian Testing Standards). Tubing with a VW-1 rating is highly flame-retardant.

Material UL VW-1 Flammability
Polyolefin UL VW-1 Colors Only - Not Clear
PVC UL VW-1 Colors & Clear
Cross-Linked PVC UL VW-1 Colors & Clear
Multi-Wall Polyolefin UL VW-1 Outer Jacket
Multi-Wall PVC UL VW-1 Outer Jacket
Kynar UL VW-1
Neoprene No
Viton No

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