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. 452-454
Mfr. Part No.901-10239
£14.80
1 Reel of 5 Metre(s)
Reel(s)
19mm 9.5mm Black Heat Shrink - 2:1 5m PVC Yes - LVR -
RS Stock No. 307-796
Mfr. Part No.857760
Brand3M
£84.79
Each
Units
3.2 mm, 4.8 mm, 6.4 mm, 9.5 mm, 12.7 mm, 19 mm Assortiment Black Heat Shrink - - 150mm Polyolefin - - GTI -
RS Stock No. 122-3481
Mfr. Part No.DWFR-16/4-0-STK
£10.90
Each (In a Pack of 25)
Units
16mm 4mm Black Heat Shrink Yes 4:1 1.2m Polyolefin Yes No DWFR -
RS Stock No. 244-0854
Mfr. Part No.DR-25-1-0-SP
£446.51
1 Reel of 30 Metre(s)
Reel(s)
25.4mm 12.7mm Black Heat Shrink No 2:1 30m Elastomer Yes No DR-25 -
RS Stock No. 808-7862
Mfr. Part No.RHW-70/20-1200/ADH-0
£58.90
Each
Units
70mm 20mm Black Heat Shrink Yes 4:1 1.2m Polyolefin No Yes RHW UL
RS Stock No. 219-6541
Mfr. Part No.DR-25-1-0-RSU-4
£58.96
1 Reel of 4 Metre(s)
Reel(s)
25.4mm 12.7mm Black Heat Shrink No 2:1 4m Elastomer Yes No DR-25 -
RS Stock No. 170-6068
Mfr. Part No.LSTT-R-4.8-0
£16.95
1 Reel of 9 Metre(s)
Reel(s)
4.8mm - Black - No 2:1 9m Polyolefin - - LSTT -
RS Stock No. 177-9325
Mfr. Part No.RNF 3000-18/6-4
£7.35
Each
Units
18mm 6mm Yellow Heat Shrink No 3:1 1.2m Polyolefin Yes No RNF-3000 UL
RS Stock No. 251-7566
Mfr. Part No.8424-8
Brand3M
£13.82
Each
Units
20.9mm 2.54mm Black Cold Shrink - - 203mm EPR - - 8420 -
RS Stock No. 874-0983
Mfr. Part No.RBK-VWS-125-NR3-X-65MM
£0.171
Each (In a Pack of 100)
Units
10.8mm 2.4mm Clear Heat Shrink Yes 4:1 65mm Polyolefin No No RBK-VWS-125 ELV, RoHS Compliant
RS Stock No. 342-7234
Mfr. Part No.DCPT-8/4-45-1.5M
£6.55
Each
Units
8mm 4mm Green/Yellow Heat Shrink No 2:1 1.5m Polyolefin Yes No DCPT -
RS Stock No. 349-8804
Mfr. Part No.192993-0633/TNA14HSAD-00L
BrandITT Cannon
£17.39
Each
Units
24.2mm - Silver Heat Shrink No - 36mm Zinc Alloy - - Trident Neptune -
RS Stock No. 433-0743
Mfr. Part No.RW-175-1/4-0-RSU-STK
£6.12
Each
Units
6.4mm 3.2mm Black Heat Shrink No 2:1 1.2m PVDF Yes No RW-175 -
RS Stock No. 341-5843
Mfr. Part No.RNF-100-3/64-6-STK
£2.06
Each
Units
1.2mm 0.6mm Blue Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 728-4716
Mfr. Part No.321-30400 HA67-69.8/11.7-PO-X-BK (2)
£41.61
Each
Units
69.8mm 11.7mm Black Heat Shrink Yes 6:1 1.2m Polyolefin - - HA67 -
RS Stock No. 342-7278
Mfr. Part No.CRN-3/64-0-STK
£2.67
Each
Units
1.2mm 0.6mm Black Heat Shrink No 2:1 1.2m Polyolefin Yes No CRN -
RS Stock No. 487-4316
Mfr. Part No.RNF-100-1-1-STK
£6.45
Each
Units
25.4mm 12.7mm Brown Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 821-4709
Mfr. Part No.FKIT221BK BK032
BrandAlpha Wire
£62.02
1 Kit
Kit(s)
Assortiment Assortiment Black Heat Shrink - 2:1 Assortiment Polyolefin - - FIT-KIT -
RS Stock No. 170-6490
Mfr. Part No.RNF-100-3/16-9-STK
£2.10
Each
Units
4.8mm 2.4mm White Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 914-6815
Mfr. Part No.318-43200 TA42-32/8-PO-X-BK (10)
£21.61
Each
Units
32mm 8mm Black Heat Shrink Yes 4:1 1.2m Polyolefin Yes - TA42 CSA, SAE, UL Listed, UL Recognized
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