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. For help selecting the right size heat shrink tubing, please see our heat shrink guide.


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. 342-7284
Mfr. Part No.CRN-1/16-0-STK
£1.83
Each
Units
1.6mm 0.8mm Black Heat Shrink No 2:1 1.2m Polyolefin Yes No CRN -
RS Stock No. 450-537
Mfr. Part No.901-10211
£14.06
Each
Units
- - - - - - - - - - - -
RS Stock No. 316-1063
Mfr. Part No.HRSR-060FR-10
£24.15
Each
Units
15.2mm 3.81mm Black Heat Shrink No 5.6:1 254mm Polyolefin Yes No HRSR -
RS Stock No. 177-9331
Mfr. Part No.RNF 3000-18/6-5
£9.91
Each
Units
18mm 6mm Green Heat Shrink No 3:1 1.2m Polyolefin Yes No RNF-3000 UL
RS Stock No. 763-0982
Mfr. Part No.450-20031 RMS 100-30-PO-X-BK (1000.0)
£56.42
Each
Units
100mm 30mm Black Heat Shrink Yes 4.5:1 1m POX - - RMS -
RS Stock No. 735-0810
Mfr. Part No.123-GB0798-07-S-0
BrandAmphenol
£28.29
Each
Units
- 14.6mm - Heat Shrink - - - - - - SCE2 -
RS Stock No. 811-2665
Mfr. Part No.TE100046271
Brand3M
£2.63
Each
Units
9mm 3mm Black Heat Shrink - 3:1 1m Polyolefin Yes - GTI-3000 -
RS Stock No. 316-1007
Mfr. Part No.SST-6-04/FR
£3.46
Each
Units
10.1mm 3.81mm Black Heat Shrink Yes 3:1 152.4mm Polymer Yes No SST -
RS Stock No. 277-7982
Mfr. Part No.XFFR-03X4
£17.67
Each
Units
7.6mm 2.54mm Black Heat Shrink No 3:1 1.2m Polyolefin Yes Yes XFFR -
RS Stock No. 712-3595
Mfr. Part No.308-30164 HIS-3-BAG-1.5/0.5-PO-X-CL (10)
£0.47
Each (In a Bag of 10)
Units
1.5mm 0.5mm Clear Heat Shrink - 3:1 200mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 718-3335
Mfr. Part No.202A132-25-0
£8.81
Each
Units
- 6.6mm - - No - - Fluid Resistant Elastomer - - 202A1 -
RS Stock No. 407-791
Mfr. Part No.TE100042056
Brand3M
£2.979
Each
Units
- - - - - - - - - - - -
RS Stock No. 487-4394
Mfr. Part No.RNF-100-1/2-8-STK
£3.55
Each
Units
12.7mm 6.4mm Grey Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 333-6352
Mfr. Part No.202A132-25-0
£8.14
Each
Units
- 6.6mm Black Heat Shrink - - 51.3mm - - - 202A1 -
RS Stock No. 251-7588
Mfr. Part No.8426-9
Brand3M
£22.64
Each
Units
30.1mm 13.9mm Black Cold Shrink - - 229mm EPR - - 8420 -
RS Stock No. 177-9218
Mfr. Part No.RNF 3000-3/1-4-2
£2.95
Each
Units
3mm 1mm Yellow Heat Shrink No 3:1 1.2m Polyolefin Yes No RNF-3000 UL
RS Stock No. 763-0995
Mfr. Part No.450-20050 RMS 185-55-PO-X-BK (1000.0)
£84.67
Each
Units
185mm 55mm Black Heat Shrink Yes 4.5:1 1m POX - - RMS -
RS Stock No. 433-0579
Mfr. Part No.ATUM-12/3-2-STK
£12.31
Each
Units
12mm 3mm Red Heat Shrink Yes 4:1 1.2m Polyolefin Yes No ATUM -
RS Stock No. 333-6374
Mfr. Part No.202A153-25-0
£10.44
Each
Units
- 21.89mm Black Heat Shrink - - 73.7mm - - - 202A1 -
RS Stock No. 808-7844
Mfr. Part No.RHW-16/4-1200/ADH-0
£12.36
Each
Units
16mm 4mm Black Heat Shrink Yes 4:1 1.2m Polyolefin No Yes RHW UL
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