Zareba® T-Post Polytape Insulators

Model #: ITTY-ZC

3 reviews
0 5 3.4
Starting at $11.99

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  • 3 Color options - black, white or yellow
  • Fits 1.25 and 1.33 T-posts
  • For use with ½", 1", and 2" polytape
  • Includes a tape holder which unlocks for easy installation
  • Keeps polytape from moving on the T-post
  • 25 insulators per bag
  • Service Experts Available To Answer Your Installation Questions

Zareba® T-Post Polytape Insulators

If the polytape moves around on the T-post, problems arise with your electric fence. This T-post insulator keeps polytape from moving on the T-post.

Our Zareba® T-Post Polytape Insulator is molded of heavy-duty polyethylene. The large flange prevents arcing. The insulator includes a tape holder which unlocks for easy installation. These electric fence insulators are available in three color options - Black, White or Yellow.

  • Fits easily on standard (1.25 in/1.33 in) studded T-posts
  • Secures easily to T-post
  • For use with ½", 1", and 2" polytape
  • UV-stabilized polyethylene
  • 25 insulators per bag
  • Current color options to match your needs – Black, White or Yellow

Zareba® is the largest manufacturer of electric fence systems offering durable, reliable electric fence products for all of your animal fencing needs.


Zareba® T-Post Polytape Insulator - Specifications

  • 3 Color options - black, white, or yellow
  • Keeps poly tape from moving on the T-post
  • Molded of heavy-duty polyethylene
  • Large flange prevents arcing
  • Includes a tape holder which unlocks for easy installation
  • Fits 1.25 and 1.33 T-posts
  • For use with ½", 1", and 2" polytape
  • 25 per bag

Disclaimer: Zareba® System does not endorse any information contained in product reviews. Please follow all label instructions for your specific use.

Most Recent Customer Reviews

Review Rate
Review posted on
September 30, 2020
Great clips By Refencing 25 acres

The clips go on the tpost perfectly so long as you use a pry bar to snap on the last corner. They never break. We are refencing 25 acres. Posts I've pulled up, had to beat the 20 yo clips off with a friggin hammer. Put them on by hand... no, use a tool

Review Rate
Review posted on
May 5, 2019
Good for Electrobraid as well By Andrew

I use these insulators with Electrobraid - you can run the line through the loop at the bottom of the tape clip. I've found that it works very well because it lets the line move freely for consistent tension along the whole line and allows you to replace insulators easily if necessary. They are stiff to fit to the T-post, although I have not had many break (I use T-posts from Tractor Supply and have found that on the occasions when insulator clips break it is due to inconsistent T-post size). For fitting, I have a 1" diameter x 5' dowel with marks for insulator height, which I then use to roll the clip onto the T-post - definitely easier on the hands.

Review Rate
Review posted on
January 14, 2019
Inadequate Replacement for SC-160 Insulators By Female Farmer

The SC-160 has been discontinued and replaced with Model ITTY-ZC. The ITTY-ZC DOES NOT FIT STANDARD T-POSTS. Buyer beware!

Response From Zareba®
Kathryn : Consumer Relations Representative


Thank you for taking the time to provide this feedback, we have shared your comments with our Product Managers and would like to know more about your experience. These insulators are designed to fit onto standard-size t-posts. Our products are covered by a 30-day guarantee and a 1-year replacement policy with a copy of the purchase receipt. Please contact our Consumer Relations Team directly at 1-855-5-ZAREBA (1-855-592-7322) for assistance. We are happy to help.

Read All Reviews (3) Write a Review
Q.Will these polytape insulators fit on a chain link fence?

No. This insulator is designed to fit on a T-Post. When installing an electric fence next to a chain link fence, we recommend a chain link insulator as the hot wire needs to be at least 4" away from the chain link.

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All About

All About Insulators

Insulators prevent electrical shorts between the electrified wire and the fence posts. Good-quality insulators are critical to a properly functioning fence. Insulators are made from materials that do not conduct electricity, most commonly plastic or ceramic.


Plastic insulators are molded from polyethylene, polycarbonate, or nylon and are designed to hold electrified wire near a variety of posts without losing energy through the post.

There are several styles to choose from because the insulator must match both the type of wire and the type of fence post being used. Plastic insulators include round post insulators, T-post insulators, wood post insulators, corner post insulators, end post insulators, and chain link fence insulators.

Make sure the plastic insulator you choose is molded from heavy-duty, high-density polyethylene (or harder plastic) with UV inhibitors. This prevents arcing and provides long life with all-weather performance, protecting it from the weather. Most insulators are available in yellow, black and white.



Like plastic insulators, porcelain insulators are designed to hold electrified wire near fence posts without losing energy through the post.

When good porcelain insulators are properly installed they should be able to last the life of your fence.

Porcelain insulators are a very good choice for using with your high tensile fence system.



There are specialized insulators that are used for specific purposes. These can be summarized as follows:

Tube Insulators

  • The tube clamp insulator attaches to standard tube-type stock to corral panels.

Corner Insulators

  • Corner post insulators are designed to withstand fence line tension generated by the fence line pulling from the anchor point or changing directions.
  • Corner insulators should also be used at fence line termination points.
  • Corner post insulators are available in plastic and ceramic, accommodating steel wire, polywire, polytape & polyrope.

Specialty Insulators

  • Other insulators allow you to fasten electrified wire or poly products to posts and fences without losing energy through the post or fence.
  • There are many specialty insulators to choose from:
    • Chain Link
    • Tube
    • Corner
    • U-Post
    • Square Post

Benefits and Considerations of High Tensile Fencing

High tensile fence is an excellent choice to safely contain most species of livestock, including various exotic species. It is also equally effective keeping unwanted predators, deer or other wild animals out.

High tensile is an affordable, low maintenance permanent perimeter fence, lasting over 40 years. It works as a simple barrier fence or can be electrified for greater effectiveness and animal safety.

The key to a successful high tensile fence installation is advanced planning, combined with proper tools and quality materials.

We recommend Zareba® high tensile components, which are rugged, reliable and designed to withstand harsh environmental conditions, providing long life for your fence.

Zareba® has developed high tensile videos to help design and build your high tensile system. Once you build a high tensile fence you won't want any other type of fencing system.


Expert Tips

Insulators come in many styles to accommodate a wide variety of post and wire types. Choose the correct type of insulator for the type of post and wire you've selected.

If you're using a low impedance fence charger, use an insulator with greater arcing protection, which will prevent the current from jumping to the fence post.

Porcelain insulators may be more expensive than plastic insulators, but they are designed to last a long, long time, usually the lifetime of your fence!

Plastic insulators can be used with all types of wire (and high tension if it is designated for it), while porcelain insulators can be used with all wires except for poly tape.

Corner posts and end posts have to withstand greater tension than other posts along the fence line. Therefore, use insulators at these areas that are designed to withstand the extra stress.

In addition, keep insulators free from dirt, dust and cobwebs.


FAQs About Insulators

Q: Do I need insulators for my electric fence system?

A: Insulators allow you to fasten electric wires near the posts without losing energy through the posts and potentially shorting out your system, so yes, definitely use insulators to maintain the current throughout your fence line.


Q: Which type of insulator should I use?

A: There are several factors to consider when determining which type of insulator you want for your electric fence system. These factors include the type of fence post you will be using, and the type of wire you will be using. For corners and end posts you will need to know how much tension you plan to have on the wire.


Q: Is a porcelain insulator better than a plastic insulator?

A: Porcelain insulators are used with high tensile fences as well as standard electric fences. They will last the life time of the fence and add a nice look to the fence. Their only drawback is their initial cost: Porcelain insulators usually cost more than plastic insulators.

Insulators made from plastic are generally used for standard electric fences only, although there are some designed for use with a high tensile fence.

More Insulator FAQs»

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