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 Priced to Clear Series Standards Met
RS Stock No. 839-5457
Mfr. Part No.F2213/64 BK103
BrandAlpha Wire
£20.09
1 Box of 25 Metre(s)
Box(es)
1.1mm 0.58mm Black Heat Shrink No 2:1 1.2m Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 839-5448
Mfr. Part No.F2213/64 BK059
BrandAlpha Wire
£0.402
Each
Units
1.1mm 0.58mm Black Heat Shrink No 2:1 1.2m Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 821-4727
Mfr. Part No.F2213/64 BK001
BrandAlpha Wire
£187.85
1 Reel of 305 Metre(s)
Reel(s)
1.1mm 1mm Black Heat Shrink No 2:1 305m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 113-1981
Mfr. Part No.F6215/8 BK072
BrandAlpha Wire
£31.38
Each
Units
15.2mm 3.81mm Black Heat Shrink Yes 5.6:1 152mm Polyolefin - - - FIT-621 -
RS Stock No. 821-4705
Mfr. Part No.F221MS/2 BK032
BrandAlpha Wire
£27.75
Each
Units
6.35 mm, 9.53 mm, 12.7 mm, 19.05 mm 3 mm, 5 mm, 6 mm, 10 mm Black Heat Shrink - 2:1 152mm Polyolefin - - - FIT-221 -
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. 839-5463
Mfr. Part No.F2213/32 BK061
BrandAlpha Wire
£0.412
Each
Units
2.3mm 1.17mm Black Heat Shrink No 2:1 152mm Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 839-5466
Mfr. Part No.F2213/32 BK103
BrandAlpha Wire
£23.28
1 Box of 25
Box(es)
2.3mm 1.17mm Black Heat Shrink No 2:1 1.2m Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 821-4755
Mfr. Part No.F2213/32 BK002
BrandAlpha Wire
£108.71
1 Reel of 152 Metre(s)
Reel(s)
2.3mm 1mm Black Heat Shrink No 2:1 152m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 821-4894
Mfr. Part No.F2213/4 CL003
BrandAlpha Wire
£148.61
1 Reel of 76 Metre(s)
Reel(s)
19mm 10mm Clear Heat Shrink No 2:1 76m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 821-4822
Mfr. Part No.F2211/4 CL003
BrandAlpha Wire
£107.80
1 Reel of 76 Metre(s)
Reel(s)
6.3mm 3mm Clear Heat Shrink No 2:1 76m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 839-5517
Mfr. Part No.F22111/2 BK070
BrandAlpha Wire
£5.22
Each (In a Pack of 5)
Units
38.1mm 19.05mm Black Heat Shrink No 2:1 152mm Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 821-4718
Mfr. Part No.FKIT221C MC032
BrandAlpha Wire
£78.37
1 Kit
Kit(s)
Assortiment Assortiment Assorted Heat Shrink - 2:1 Assortiment Polyolefin - - - FIT-KIT -
RS Stock No. 839-5485
Mfr. Part No.F2211/4 BK064
BrandAlpha Wire
£0.657
Each
Units
6.3mm 3.18mm Black Heat Shrink No 2:1 152mm Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 839-5511
Mfr. Part No.F22111/2 BK105
BrandAlpha Wire
£44.84
1 Box of 5
Box(es)
38.1mm 19.05mm Black Heat Shrink No 2:1 1.2m Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 821-4828
Mfr. Part No.F2211/4 BK003
BrandAlpha Wire
£107.80
1 Reel of 76 Metre(s)
Reel(s)
6.3mm 3mm Black Heat Shrink No 2:1 76m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 113-1953
Mfr. Part No.F6212 BK072
BrandAlpha Wire
£35.54
Each
Units
50.8mm 9.5mm Black Heat Shrink Yes 6:1 152mm Polyolefin - - - FIT-621 -
RS Stock No. 821-4948
Mfr. Part No.F22111/2 BK015
BrandAlpha Wire
£176.88
1 Reel of 38 Metre(s)
Reel(s)
38.1mm 19mm Black Heat Shrink No 2:1 38m Polyolefin - No - FIT-221 CSA, UL
RS Stock No. 839-5488
Mfr. Part No.F2211/4 BK103
BrandAlpha Wire
£37.73
1 Box of 25
Box(es)
6.3mm 3.18mm Black Heat Shrink No 2:1 152mm Cross Linked Polyolefin Yes No - FIT-221 CSA, UL
RS Stock No. 821-4923
Mfr. Part No.F2211IN GR003
BrandAlpha Wire
£207.54
1 Reel of 76 Metre(s)
Reel(s)
25.4mm 13mm Green Heat Shrink No 2:1 76m Polyolefin - No - FIT-221 CSA, UL