Our 4:1 over-expanded flexible, flame retardant heat shrinkable polyolefin tubing is used for special circumstances such as jacket retrofitting or repair and electrical insulation of wire assemblies with oversize components or connectors.

The over-expanded product configuration easily fits over the end of a connector, and shrinks down to 25% of its original diameter to fit snugly over the wires. Our tubing is available in by the single foot. Available in Black only.

Our 4:1 heat shrink 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 also recommended for applications that require a water-tight seal to protect wire, cable and connector components.

• Due to the nature of heat shrink, it does shrink length wise as well as the diameter. 4:1 heat shrink will shrink 14% or less in the axial direction during the shrink process.
• 4:1 Heat Shrink is RoHS Compliant, view the certificate here
• View Military Specifications and Manufacturers' Cross Reference

Specification reference:
MIL-I-23053/5 Class 1 and Class 3. MIL-R-46846, Type V
UL 224 125°C, 600 V, VW-1 File E48762 YDPU2

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.

4:1 Adhesive Heat Shrink Tubing
Minimum Shrink Temperature: 90°C
Product Dimensions

*Metric sizes available for special orders.

View Measurement Conversion Chart

STANDARD WALL

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.

NOMINAL ID	MINIMUM ID BEFORE SHRINKING	MAXIMUM ID AFTER SHRINKING	MINIMUM ID AFTER SHRINKING	PART # per FOOT	PRICE / FOOT BLACK
1/2"	0.470"	0.118"	0.043"	HS4-050-FT	$2.75
5/8"	0.75"	0.188"	0.051"	HS4-075-FT	$4.75
1"	0.945"	0.236"	0.059"	HS4-100-FT	$8.75
1-1/2"	1.50"	0.374"	0.059"	HS4-150-FT	$14.00
4:1 Heat Shrink Technical Specifications, click here For Military Specifications and 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

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.

NOMINAL ID	MINIMUM ID BEFORE SHRINKING	MAXIMUM ID AFTER SHRINKING	NOMINAL ID (Inside Diameter)	PART #	COLOR	PRICE / FOOT
3/16"	0.1575"	0.039"	0.0354"	HS4A-0188-FT	Black	$0.95
5/16"	0.3150"	0.079"	0.0354"	HS4A-0313-FT	Black	$1.12
1/2"	0.4724"	0.118"	0.0512"	HS4A-050-FT	Black	$2.56
3/4"	0.6300"	0.157"	0.0630"	HS4A-075-FT	Black Temporarily Out of Stock, Red	$2.62
1"	0.9449"	0.236"	0.0827"	HS4A-100-FT	Black	$4.12
1-1/4"	1.2598"	0.315"	0.0906"	HS4A-125-FT	Black	$4.93
2"	2.05"	0.512"	0.100"	HS4A-200-FT	Black	$5.50
4 foot sections are the maximum on Dual Wall and Specialty Tubing Click here for 4:1 Adhesive Lined Tubing (Dual Wall) specifications

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.

ARTICLES - A place to find educational articles covering a wide range of topics, all categorized according to your areas of interest.Learn more

• Heat Shrink Tubing: How It Was Invented, and Why We Use It
• The Handyman's Guide to Improvisation: 7 New Ways to Use Heat Shrink Tubing

HOW-TO CORNER -
How to use Heat Shrink Tubing
Terminate the ends of your Braided Sleeving with Heat Shrink
How do we measure Heat Shrink?

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

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2:1 Heat Shrink Tubing Kit Price $19.99 2:1 Standard Wall From $0.34 per foot 2:1 Dual Wall Call for pricing It is designed for military and commercial, and for the consumer/OEM market requiring UL and/or Canadian Standards approval.	3:1 Standard Wall From $0.95 per foot 3:1 Adhesive From $1.17 per foot The over-expanded product configuration easily fits over the end of a connector and shrink down 33%.
4:1 Standard Wall From $2.75 per foot 4:1 Adhesive From $0.95 per foot Our 4:1 heat shrink tubing is used for jacket retrofitting or repair and electrical insulation of wire assemblies with oversize components or connectors.	Heat Shrink UV Reactive From $1.00 per foot It is available in a 2:1 shrink ratio and in Luminous, Neon Pink, Neon Yellow, Neon Green, Luminous Green, and Gold.
2:1 Neoprene Heat Shrink Tubing 2:1 Viton® Heat-shrinkable 2:1 Diesel Resistant Heat Shrink Tubing These heat shrink tubings are formulated for special types of situations where standard protection would not be enough.	Heat Shrink Tools/ Heat Guns From $29.99 We offer a range of options to shrink your tubing, from small torches to ovens.
Heat Shrink End Caps From $0.70 Secure the ends of the tubing with these caps available in black in all three sizes.	Conductive Heat Shrink Connectors From $4.70/foot They are entirely coated on their inner surface providing shielding around the joints being connected.
High Temperature (Fluoropolymer) Heat Shrink Tubing
Fluorinated Ethylene-Propylene (FEP) Heat Shrink Tubing From $2.55 per foot FEP is used in cases where temperatures are not as extreme, and very high shrink ratios are not necessary.	Polytetrafluoroethylene (PTFE) Heat Shrink Tubing From $4.14 per foot PTFE is widely used in military applications because of its high continuous use temperature and outstanding chemical resistance.
Polyvinylidene Fluoride (PVDF, Kynar®) Heat Shrink Tubing From $5.49 per 4 FT PVDF is used in applications where continuous operating temperatures are 150-175°C. It is used where outstanding abrasion and cut-through resistance are required.	PTFE/FEP Dual Wall Heat Shrink Tubing From $2.26 per FT Constructed with an outer layer of heat shrinkable PTFE and an inner layer of FEP, it is easy to apply & is designed to provide a tight, moisture-proof bond.