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. 811-2704
Mfr. Part No.MDTA32/7
Brand3M
£10.03
Each
Units
32mm 7mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 811-2716
Mfr. Part No.MDTA50/18
Brand3M
£16.52
Each
Units
50mm 18mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
New
RS Stock No. 190-2063
Mfr. Part No.MDTA50/18
Brand3M
£14.896
Each (In a Box of 100)
Units
50mm 18mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 811-2653
Mfr. Part No.TE100046032
Brand3M
£2.00
Each
Units
3mm 1mm Black Heat Shrink No 3:1 1m Polyolefin Yes - - GTI-3000 -
RS Stock No. 811-2662
Mfr. Part No.TE100046198
Brand3M
£2.14
Each
Units
6mm 2mm Black Heat Shrink No 3:1 1m Polyolefin - - - GTI-3000 -
RS Stock No. 251-7601
Mfr. Part No.8427-12
Brand3M
£32.88
Each
Units
35mm 16.8mm Black Cold Shrink - - 305mm EPR - - - 8420 -
RS Stock No. 811-2713
Mfr. Part No.MDTA38/12
Brand3M
£12.81
Each
Units
38mm 12mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 811-2697
Mfr. Part No.MDTA12/3
Brand3M
£5.33
Each
Units
12mm 3mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 251-7623
Mfr. Part No.8428-12
Brand3M
£43.97
Each
Units
49.3mm 24mm Black Cold Shrink - - 305mm EPR - - - 8420 -
RS Stock No. 811-2700
Mfr. Part No.MDTA27/8
Brand3M
£9.45
Each
Units
27mm 8mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 307-847
Mfr. Part No.804130
Brand3M
£8.42
Each
Units
20.9mm 2.54mm Black Cold Shrink - - 203.2mm EPDM - - - - -
RS Stock No. 811-2738
Mfr. Part No.TE100038823
Brand3M
£101.53
Each
Units
- Assortiment - Heat Shrink - 3:1 150mm - - - - GTI -
RS Stock No. 251-7651
Mfr. Part No.8443-2
Brand3M
£9.09
Each
Units
17.3mm 2.8mm Grey Cold Shrink - - 39.6mm Silicone Rubber Yes - - 8440 -
RS Stock No. 811-2722
Mfr. Part No.HDTA30/8
Brand3M
£21.36
Each
Units
30mm 8mm Black Heat Shrink Yes 4:1 1m Polyolefin Yes - - HDT-A -
RS Stock No. 811-2729
Mfr. Part No.TE100037445
Brand3M
£9.52
Each
Units
19mm 6mm Black Heat Shrink Yes 4:1 1m Polyolefin Yes - - HDT-A -
RS Stock No. 811-2671
Mfr. Part No.TE100046115
Brand3M
£6.30
Each
Units
39mm 12.7mm Black Heat Shrink - 3:1 1m Polyolefin Yes - - GTI-3000 -
RS Stock No. 811-2707
Mfr. Part No.MDTA19/6
Brand3M
£9.33
Each
Units
19mm 6mm Black Heat Shrink Yes 4.5:1 1m Polyolefin Yes - - MDT-A -
RS Stock No. 407-795
Mfr. Part No.TE100042072
Brand3M
£19.94
1 Box of 5 Metre(s)
Box(es)
18mm 6mm Black Heat Shrink - 3:1 5m Polyolefin Yes - - HSR 3000 -
RS Stock No. 308-042
Mfr. Part No.804240
Brand3M
£16.24
Each
Units
67.8mm 32.2mm Black Cold Shrink - - 152mm EPR - - - - -
RS Stock No. 308-014
Mfr. Part No.804160
Brand3M
£17.15
Each
Units
35.1mm 16.8mm Black Cold Shrink - - 303.5mm EPR - - - - -