Heat-Shrink & Cold-Shrink Sleeves

Heat shrink tubing is a type of extruded plastic tube that reduces in size when heated to a pre-determined shrink ratio to fit a specific application. A sleeve should be selected in a size larger than required to cover both the wire and components it is to be used with, before being shrunk to fit. Once fitted, the sleeve provides long lasting durability.

Materials and Types
Heat shrink is available in various different materials, colours, sizes and shrink ratios to suit the application required. Some are available with an adhesive lining that helps to bond the tubing with the cables and components.
Polyolefin is the most common material as it is highly durable and can withstand high temperatures without a restricted shelf life. They are also manufactured from PVC, fluoropolymer, neoprene and elastomeric materials.

The material is often cross linked to assist with the tubing shrinking back to its original dimensions.
The pre-determined shrink ratio, for example, 2:1 or 3:1, is the measurement of how small the sleeve goes in comparison to its expanded size. When the number is higher in the shrink ratio the greater the shrinkage. It allows a precise, secure fit that does not come off easily.

Applications
Heat shrink tubing is versatile and easy to use therefore it can be applied in an assortment of applications, the most common uses being:
  • Electrical insulation – covering joints and repairs
  • Strain relief – relieving pressure from the cable
  • Wire bundling – in harness building and cable organisation
  • Environmental and mechanical protection – preventing damage from abrasion, moisture, dust and chemicals
  • Identification – the wide range of colours the tubing is manufactured in allows it to be used for colour coding and component ID

Installation
When selecting the right size tubing, you should consider the maximum and minimum diameter of what you are covering. Use this information to check against the recovered diameter (the diameter after shrinking) and expanded diameter (the pre-shrinkage diameter) of the sleeve.

You can cut most tubing to a suitable length using standard scissors. The unshrunk tubing can be slid over the area or objects it is to cover. Then with a hand held heat gun or heat shrink oven, the sleeve is shrunk tightly. To prevent uneven shrinkage or overheating, check the recommended heating temperature beforehand.

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Description Price Sleeve Diameter Shrunk Diameter Colour Sleeve Type Adhesive Lined Shrink Ratio Sleeve Length Material Flame Retardant Halogen Free Series Standards Met
RS Stock No. 487-3852
BrandRS PRO
£66.00
Each
Units
Assorted Assorted Assorted Heat Shrink Yes 2:1, 3:1 Assorted Length Polyolefin Yes - - RoHS Compliant
RS Stock No. 397-679
BrandRS PRO
£72.00
Each
Units
2.4 mm, 3 mm, 3.2 mm, 4.8 mm, 6.4 mm, 9.5 mm, 12.7 mm Assorted Black, Blue, Brown, Green/Yellow, Red, White, Yellow Heat Shrink Yes 2:1, 3:1 Assorted Length Polyolefin Yes - - RoHS Compliant
RS Stock No. 157-3818
Mfr. Part No.CGAT-12/4-0
£4.65
Each
Units
12mm 4mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 157-3795
Mfr. Part No.CGAT-6/2-0
£5.50
Each
Units
6mm 2mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 157-3802
Mfr. Part No.CGAT-9/3-0
£6.50
Each
Units
9mm 3mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 157-3824
Mfr. Part No.CGAT-18/6-0
£8.55
Each
Units
18mm 6mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 481-1775
BrandRS PRO
£3.87
Each
Units
3mm 1mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 157-3903
Mfr. Part No.CGAT-24/8-0
£10.00
Each
Units
24mm 8mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 157-3789
Mfr. Part No.CGAT-3/1-0-RS-157-3789
£4.40
Each
Units
3mm 1mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 481-1854
BrandRS PRO
£14.40
Each
Units
40mm 13mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 481-1826
BrandRS PRO
£7.70
Each
Units
19mm 6mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 481-1810
BrandRS PRO
£4.92
Each
Units
12.7mm 4mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 481-1804
BrandRS PRO
£5.52
Each
Units
9.5mm 3mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 481-1797
BrandRS PRO
£4.68
Each
Units
6.4mm 2mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 811-2704
Mfr. Part No.MDTA32/7
Brand3M
£10.03
Each
Units
32mm 7mm Black Heat Shrink Yes 4.5:1 1 m Polyolefin Yes - MDT-A -
RS Stock No. 157-3880
Mfr. Part No.DWTC-16/4-X-STK
£11.36
Each
Units
16mm 4mm Clear Heat Shrink Yes 4:1 1.2 m Polyolefin No No DWTC -
RS Stock No. 316-1631
Mfr. Part No.ATUM-8/2-0
£8.53
Each
Units
8mm 2mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No ATUM -
RS Stock No. 344-0603
Mfr. Part No.HTAT-4/1-0-STK
£4.04
Each
Units
4mm 1mm Black Heat Shrink Yes 4:1 1.2 m Cross Linked Polyolefin Yes No HTAT -
RS Stock No. 344-0647
Mfr. Part No.HTAT-16/4-0-STK
£13.40
Each
Units
16mm 4mm Black Heat Shrink Yes 4:1 1.2 m Cross Linked Polyolefin Yes No HTAT -
RS Stock No. 157-3846
Mfr. Part No.DWTC-4/1-X-STK
£6.02
Each
Units
4mm 1mm Clear Heat Shrink Yes 4:1 1.2 m Polyolefin No No DWTC -