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3:1 Heat Shrink Tubing
Professional Grade Flexible Flame Retardant Polyolefin Tubing
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What's special about 3:1 Heat Shrink Tubing?
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Our 3:1 heat shrink tubing is an effective way to professionally finish the ends of a wire harness. The over-expanded product configuration easily fits over the end of a connector, and shrinks down to 33% of its original diameter to fit snugly over the wires. With our wide assortment of bright colors, now you can attractively color coordinate the ends of our expandable braided sleeving. Our tubing is available in rolls or by the foot.
3:1 Heat Shrink is ROHS (Restriction of Hazardous Substances) Compliant
Adhesive Lined Tubing
Our 3:1 heat shrink tubing is also available with a "dual-wall" construction. During application, the inner layer melts and flows, creating an adhesion layer to ensure a snug fit to your harness and/or connector.
It is recommended for applications that require a water-tight seal to protect wire, cable and connector components.
It can also be used for color coding, such as on industrial batteries where red & black are used as a protective strain relief and to identify the positive (red) connection or negative (black) connection.
- View 3:1 Heat Shrink Technical Specs
- View 3:1 Adhesive Heat Shrink Technical Specs
- View Military Specifications & Manufacturers' Cross Reference
- 3:1 Heat Shrink is ROHS Compliant
- Measurement Conversion Chart for Milimeters, Decimals and Fractions
LG heat shrinkable and non-shrinkable tubing products do not contain the compound Di (2-ethylhexyl) phthalate commonly referred to as DEHP.
In addition, LG heat shrinkable and non-shrinkable tubing products do not contain PFOS (perfluoroctane sulfonate), PFOA (perfluorocanoic acid) or Tinuvin 320.
3:1 Heat Shrink - PER FOOT AND BULK
Please Note: Our Diameters for Heat Shrink Tubing are measured as ROUND TUBE, NOT FLAT
Due to the nature of the materials, all braided sleeving, wire loom, heat shrink, and spiral wrap products sold by the foot will not be refunded IN FULL if they are cut up in sections of 20' or shorter. 50% restocking fee on returns of 20 feet or less. 25% restocking fee if there is a reorder.
| PART # | NOMINAL SIZE | DESCRIPTION | LENGTH | PRICING/ft | COLOR | PRICE Add Quantity at Checkout |
| Pricing is automatically calculated based on quantity entered at checkout | ||||||
HS3-0063FT
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1/16" | Heat Shrink per Foot | per foot | $0.53 per ft | Black | |
| 1/16" | Heat Shrink per Minispool | per 100 ft | $0.21 per ft | Black | ||
HS3-0063SP500 |
1/16" | Heat Shrink per Bulk Spool | per 500 ft | $0.15 per ft | Black | |
HS3-0125-FT
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1/8" | Heat Shrink per Foot | per foot | $0.64 per ft | Black, Clear | |
| 1/8" | Heat Shrink per Minispool | per 100 ft | $0.26 per ft | Black, Clear | ||
HS3-0125SP500 |
1/8" | Heat Shrink per Bulk Spool | per 500 ft | $0.18 per ft | Black, Clear, White | |
HS3-0188FT
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3/16" | Heat Shrink per Foot | per foot | $0.84 per ft | Black, Clear | |
| 3/16" | Heat Shrink per Minispool | per 100 ft | $0.36 per ft | Black, Clear | ||
| HS3-0188-SP250 | 3/16" | Heat Shrink per Bulk Spool | per 250 ft | $0.24 per ft | Black, Clear, White | |
| HS3-025FT | 1/4" | Heat Shrink per Foot | per foot | $0.91 per ft | Black, Clear, Red, Purple | |
| 1/4" | Heat Shrink per Minispool | per 50 ft | $0.36 per ft | Black, Clear, Red, Purple | ||
| HS3-025SP250 | 1/4" | Heat Shrink per Bulk Spool | per 250 ft | $0.25 per ft | Black, Clear, White | |
| HS3-0375FT | 3/8" | Heat Shrink per Foot | per foot | $1.01 per ft | All | |
| 3/8" | Heat Shrink per Minispool | per 50 ft | $0.41 per ft | All | ||
| HS3-0375SP200 | 3/8" | Heat Shrink per Bulk Spool | per 200 ft | $0.33 per ft | Black, Clear, White | |
| HS3-050FT | 1/2" | Heat Shrink per Foot | per foot | $1.19 per ft | Black, Clear, White, Red, Purple, Gray Temporarily Out of Stock, Yellow, Blue, Green | |
| 1/2" | Heat Shrink per Minispool | per 50 ft | $0.48 per ft | Black, Clear, White, Red, Purple, Gray Temporarily Out of Stock, Yellow, Blue, Green | ||
| HS3-050SP200 | 1/2" | Heat Shrink per Bulk Spool | per 200 ft | $0.35per ft | Clear, Black, White | |
| HS3-0625FT | 5/8" | Heat Shrink per Foot | per foot | $1.32 per ft | Black | |
| 5/8" | Heat Shrink per Minispool | per 50 ft | $0.53 per ft | Black | ||
| HS3-0625SP200 | 5/8" | Heat Shrink per Bulk Spool | per 200 ft | $0.36 per ft | Black | |
| HS3-075FT | 3/4" | Heat Shrink per Foot | per foot | $1.58 per ft | All | |
| 3/4" | Heat Shrink per Minispool | per 50 ft | $0.63 per ft | All | ||
| HS3-075SP100 | 3/4" | Heat Shrink per Bulk Spool | per 100 ft | $0.43 per ft | Clear, Black | |
| HS3-0875FT | 7/8" | Heat Shrink per Foot | per foot | $1.87 per ft | Black | |
| 7/8" | Heat Shrink per Minispool | per 50 ft | $0.75 per ft | Black | ||
| HS3-0875SP100 | 7/8" | Heat Shrink per Bulk Spool | per 100 ft | $0.70 per ft | Black | |
| HS3-100FT | 1" | Heat Shrink per Foot | per foot | $2.05 per ft | All | |
| 1" | Heat Shrink per Minispool | per 50 ft | $0.82 per ft | All | ||
| HS3-100SP100 | 1" | Heat Shrink per Bulk Spool | per 100 ft | $0.73 per ft | Clear, Black, White | |
| HS3-125-FT | 1-1/4" | Heat Shrink per Foot | per foot | $3.39 per ft | Black | |
| 1-1/4" | Heat Shrink per Minispool | per 50 ft | $1.79 per ft | Black | ||
| HS3-125SP100 | 1-1/4" | Heat Shrink per Bulk Spool | per 100 ft | $1.27 per ft | Black | |
| HS3-150FT | 1-1/2" | Heat Shrink per Foot | per foot | $4.09 per ft | All | |
| 1-1/2" | Heat Shrink per Minispool | per 50 ft | $2.18 per ft | All | ||
| HS3-150SP100 | 1-1/2" | Heat Shrink per Bulk Spool | per 100 ft | $1.46 per ft | Clear, Black, White | |
3:1 Heat Shrink - Technical Specifications. click here
For military specifications and a manufacturers' cross reference, click here
Normally our policy is to supply continuous lengths. If it is absolutely necessary to receive one continuous length, please specify.
Dual Wall 3:1 - PER FOOT
Please Note: Our Diameters for Heat Shrink Tubing are measured as ROUND TUBE, NOT FLAT
Due to the nature of the materials, all braided sleeving, wire loom, heat shrink, and spiral wrap products sold by the foot will not be refunded IN FULL if they are cut up in sections of 20' or shorter. 50% restocking fee on returns of 20 feet or less. 25% restocking fee if there is a reorder.
The longest continuous length available is 4 ft.
| PART # | BEFORE SHRINKING | AFTER SHRINKING | COLOR | PRICE / FOOT |
| HS3A-0125FT | 1/8 in. | .04 in. | Clear, Black and Red | $1.17![]() |
| HS3A-025FT | 1/4 in. | .08 in. | Black, Red, Green | $1.50![]() |
| HS3A-0375FT | 3/8 in. | .125 in. | Yellow, White, Black, Red, Clear, Blue | $2.50![]() |
| HS3A-050FT | 1/2 in. | .167 in. | Yellow, Black, Red, Clear, Blue, Green | $3.00![]() |
| HS3A-075FT | 3/4 in. | .250 in. | Yellow, Black, Red, Clear, Blue | $3.50![]() |
| HS3A-100FT | 1 in. | .375 in. | Yellow, Black, Red, Clear | $6.00![]() |
| HS3A-150FT | 1 1/2 in. | .500 in. | Black, Clear, Red | $12.00![]() |
Dual Wall 3:1 - CUT PIECES
Please Note: Our Diameters for Heat Shrink Tubing are measured as ROUND TUBE, NOT FLAT
Custom Sizes and Cut Pieces are NON-RETURNABLE and NON-REFUNDABLE
| PART # | BEFORE SHRINKING | AFTER SHRINKING | LENGTH / PIECE | PIECES / PACK | COLOR | PRICE / PACK |
| HS3A-0125PCS | 1/8 in. | .04 in. | 6 in. | 8 | Black | $4.00![]() |
| HS3A-025PCS | 1/4 in. | .08 in. | 6 in. | 8 | Black | $5.00![]() |
| HS3A-0375PCS | 3/8 in. | .125 in. | 6 in. | 6 | Black | $6.00![]() |
| HS3A-050PCS | 1/2 in. | .167 in. | 6 in. | 6 | Black | $6.50![]() |
| HS3A-075PCS | 3/4 in. | .250 in. | 6 in. | 4 | Black | $7.00![]() |
| HS3A-100PCS | 1 in. | .333 in. | 6 in. | 3 | Black | $7.75![]() |
| HS3A-150PCS | 1 1/2 in. | .500 in. | 6 in. | 2 | Black | $8.00![]() |
Normally our policy is to supply continuous lengths. If it is absolutely necessary to receive one continuous length, please specify.
- Instructions on how to use Heat Shrink Tubing
- Not sure what size to use? Click here
- How do we measure Heat Shrink?
Limiting Oxygen Index (LOI)
The ratio of how much oxygen - as compared to other gases - needs to be present in the air surrounding a particular material in order for that material to burn. The fact that Earth's normal atmospheric air contains around 21% oxygen is used a reference point when materials are classified into burn categories that are based on Limiting Oxygen Index. Substances that are combustible in air containing less than 21% oxygen are considered flammable, while those that burn in the range of anything greater than 21% but less than 28% are typically labeled "slow burning". Any material with an LOI that exceeds 28% is classified as self-extinguishing.
In the table below, you'll find a list of polymers commonly found in our heat shrink tubing and braided sleeving products, along with their LOIs and the burn categories each falls into.
| MATERIAL | ALTERNATE NAME | LOI | CATEGORY |
| ECTFE (Ethylene chlorotrifluoroethylene) | Halar | 64% | Self Extinguishing |
| Nomex | N/A | 28% | Slow Burning |
| Nylon 6:6 | N/A | Ranges fron 24-29% | Slow Burning to Self Extinguishing |
| PET (Polyethylene Terephthalate) | Mylar (film), Dacron (fiber) | Ranges from 21-34% | Slow Burning to Self Extinguishing |
| Polyethylene (PE) | N/A | 17% | Flammable |
| Polypropylene (PP) | polythene (in the UK) | 17% | Flammable |
| Polytetrafluoroethylene (PTFE) | Teflon | 95% | Self Extinguishing |
| Polyvinyl Chloride (PVC) | N/A | Ranges from 45-49% | Self Extinguishing |
RELATED ARTICLES -
- Heat Shrink Tubing: How It Was Invented, and Why We Use It
- Terminate the ends of your Braided Sleeving? Click here
- The Handyman's Guide to Improvisation: 7 New Ways to Use Heat Shrink Tubing
HOW-TO CORNER -
Instructions on how to use Heat Shrink Tubing. Click here
Terminate the ends of your Braided Sleeving? Click here
How do we measure Heat Shrink? View here
CATALOG - PDF
For your convenience, we have made our brochure and catalogs available online in PDF format. Downloading the PDF catalog will take you no more than 5 minutes, so you won’t have to wait days for the print catalog. PDF catalogs include links to our products: just click on the hyperlinked product headings, and you’ll be directed right to our website.
Office
PDF Catalog 2 MB
Automotive
PDF Catalog 2.6 MB
Aerospace/Aircraft
PDF Catalog 2 MB
Utilities & Energy
PDF Catalog 3.7 MB
Datacom/Telecom
PDF Catalog 5.7 MB


Fits over the end of a connector, but will shrink down to 33% of its original diameter











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