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TEMCo Industrial HD Marine Heat Shrink Tube 3:1 Adhesive Glue Lined 12 in long


303 in stock




Length: 12″

Material: Polyethylene

Shrink Ratio:  3:1

Adhesive Adheres to: Most plastics, metals, rubber,

Continuous Operating Temperature: -45C up to +145C

Longitudinal Shrinkage (Lengthwise): Less than 8%

Insulating Voltage Capability: 600 volts

Warranty: 1 Year

Resistant to: Salt water, Oil, Gasoline, Diesel Fuel, and more

Applications: Marine, Automotive / Motorsports, Industrial, Environmental sealing. For use as a strain relief on connectors, wire and terminals. Splicing, abrasion protection, and repair of damaged wire insulation.


TEMCo Industrial adhesive lined shrink tubing is a 3:1 flexible tubing offering the advantages of integral, adhesive-lined construction. The tubing is made from flexible polyethylene with an internal layer of special thermoplastic adhesive. The heat-shrinkable outer wall is selectively cross-linked, while maintaining the high flow and excellent adhesion of the inner sealant liner. When heated in excess of 121ºC (250ºF), the tubing rapidly shrinks to a skintight fit, forcing the melted adhesive lining to flow and cover the substrate. The adhesive forms a flexible bond with a wide variety of rubbers, plastics and metals. Upon cooling, the adhesive solidifies, forming a permanent, non-drying, flexible and water resistant barrier. Adhesive reflow will occur at temperatures above 80ºC (176ºF).

What is it good for?

TEMCo Industrial adhesive lined shrink tubing offers excellent protection for electronic components, wire splices, wire bundles and harness breakouts. Automotive, truck and marine wiring splices and harness breakouts are quickly and easily protected from harsh environments.

What is Shrink Ratio?
TEMCo Industrial adhesive lined shrink tubing has a 3:1 shrink ratio. This means that the starting diameter of the tubing as supplied is 3 times the fully contracted diameter if allowed to completely shrink. The wall thickness of the tubing is proportional to the percentage of shrinkage.

How is it measured?
Shrink tube is measured using the inside diameter when held in a tube position. This is the diameter of wire, tube or other cylindrical material that it will cover. It is shipped flat and will naturally be wider in this orientation than its inside tube measurement.

How do I get the best performance out of it?
When shrinking adhesive lined shrink tubing, it is important to achieve a complete liquid flow of the adhesive to get a complete bond with the item being covered. A good visual reference is when the tube has completely contracted and the glue has partially flown past the end of the tube. This means that a complete bond is likely.

What should I use to heat the tubing?
The use of a heat gun is ideal, as it is not likely to burn the tubing and provides relatively uniform heat. Additionally, if a large volume of items are to be covered, an enclosure may be made to enclose the parts or the ends of wire with shrink tubing in order to control the consistency of heating. This method works well even if the heat source remains as a heat gun. Alternately, an ordinary torch will perform adequately as long as careful attention is used to prevent burning of the tubing. When using a torch, sometimes it can be tricky to get the tubing hot enough to produce ideal adhesive flow while attempting to prevent burning.

11 Months From Now…

If it doesn’t fit.

If it looks funny.

Or you just changed your mind.

Even if it’s opened, used or broken, we will still accept your return and pay shipping both ways.

No restocking fee. Up to 1 year.

Size and Dimensions

(Nominal, in.)

Wire Range (Recommended Best Fit)

Supplied Inside Diameter

Contracted Inside Diameter

Total Contracted wall Thickness

Adhesive Contracted Wall Thickness

< 14 AWG
0.13 in (3.2 mm)
0.04 in (1.0 mm)
0.04 in (1.0 mm)
0.02 in (0.40 mm)
22 – 12 AWG
0.19 in (4.8 mm)
0.06 in (1.6 mm)
0.04 in (1.1 mm)
0.02 in (0.40 mm)
18 – 10 AWG
0.25 in (6.4 mm)
0.08 in (2.0 mm)
0.05 in (1.2 mm)
0.02 in (0.50 mm)
14 – 8 AWG
0.31 in (7.9 mm)
0.11 in (2.7 mm)
0.06 in (1.4 mm)
0.02 in (0.50 mm)
12 – 6 AWG
0.37 in (9.5 mm)
0.13 in (3.2 mm)
0.06 in (1.4 mm)
0.02 in (0.50 mm)
8 – 4 AWG
0.50 in (12.7 mm)
0.17 in (4.2 mm)
0.07 in (1.7 mm)
0.02 in (0.50 mm)
6 – 1 AWG
0.59 in (15 mm)
0.2 in (5.2 mm)
0.07 in (1.8 mm)
0.02 in (0.60 mm)
4 – 2/0 AWG
0.75 in (19.1 mm)
0.25 in (6.3 mm)
0.08 in (2.0 mm)
0.02 in (0.60 mm)
1 in (25.4 mm)
0.33 in (8.5 mm)
0.08 in (2.1 mm)
0.02 in (0.60 mm)
1 3/16″
1.18 in (30 mm)
0.4 in (10.2 mm)
0.09 in (2.2 mm)
0.02 in (0.60 mm)
1 1/2″
1.54 in (39 mm)
0.53 in (13.5 mm)
0.09 in (2.4 mm)
0.02 in (0.60 mm)
1.97 in (50 mm)
0.67 in (17.0 mm)
0.11 in (2.7 mm)
0.03 in (0.70 mm)
Same Day Shipping Tues-Fri before 3pm PST

Free Shipping

To Lower 48 States


LIFETIME Warranty from an American name. NON-GENERIC.

As an OEM, we use many of the products we sell. As a result, only high quality materials are offered to you.

Founded in 1968 in Fremont, CA. We’ll be here if you need us.

Our return policy. If you don’t like it, we’ll take it back and pay the shipping!







4 ft





Lower 48 States: FREE!

Local Pickup Available: FREE!*


Calculated by location.

Orders are usually processed and shipped within 24 to 48 hours of receipt of your payment. Please provide us with a physical shipping address (failing to do so may delay your order). We may ship an order by a different courier at our discretion. If you need to receive an order within a guaranteed time frame, please contact us for rush options and expedited shipping.

Import duties, taxes, and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. Furthermore, we will not mark merchandise values below value or mark items as “Gifts”.

*Local Pick Up is available at our Fremont CA location, Monday through Friday 9:00 a.m. to 5:00 p.m. Please contact us ahead to ensure that your item is in stock at our location before pick-up.

** International Buyers, Please Note: If shipping for your country is not listed, contact us for details.

*** Same Day Shipping: Most in-stock orders placed Monday through Friday before 4pm Pacific Standard Time will ship out same day. Weekends, Holidays and any day following a Holiday are excluded from this offer. If multiple items are bought on the same order, all items must have Same Day Shipping offered for the order to ship out the same day.

Payment & Returns


TEMCo accepts the following payment methods: PayPal, Visa, MasterCard, AMEX, Discover.

We charge 9.75% sales tax for all orders shipping within California. Tax exemption is available if we are provided with a valid California resale certificate.


TEMCo allows for the return of products for 1 year from the date of purchase. Even if it’s opened, broken, or used, we will still accept your return and pay shipping both ways.

We will replace the item with an identical item or issue a refund for the value of the item.

Customer feedback

We strive to provide 5-star service. Shop with confidence!

100% Positive reviews

We want nothing more for our buyers than to be 100% happy with their purchase. We strive to earn a 5-star rating from every purchase. When you receive your purchase, please take a moment to leave us a positive feedback. If there was something unsatisfactory about your purchase, please contact us before leaving feedback and we’ll do what’s necessary to remedy the problem and ensure your satisfaction!

When your order ships from our warehouse, we will automatically leave you positive feedback.

“I have always been delighted with the service from TEMCo.”

Your customer service, which is seldom needed, is wonderful, the staff knowledgeable and courteous. The shipping has been quite fast, which make my life easier… So, thank you, for the good experiences with the company!

Rick C

“I have ordered from TEMCo several times over the last 2 years and have always found the process to be simple and quick.”

Making the order takes only a few moments, the product is always high quality and the shipping fast.

Glen B

“Thank you for a very satisfying and honest transaction.”

It is really great to deal with a company that does exactly what they advertise. I can truly say I would recommend your company to anyone interested in the equipment you sell.

Paul Gilley

“The service was awesome.”

I  had many tech questions, and they spent about 30 mins on the phone answering all of them for me. It is not to often to find service like that!!!!! I am so happy and will definitly purchase from them again. A+++++

MRZ Contracting

Still not sure about us?

Check us out on the Better Business Bureau and Reseller Ratings, or look at our eBay seller ratings with a perfect score in all categories.

About TEMCo

Since 1968, TEMCo has become a trusted name in industrial power products.

TEMCo products meet the demands of tough industrial applications with dependability and quality. We are proud to be an accredited member of the Better Business Bureau Online Reliability Program. Some of our customers include:

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