Heat-Shrink & Cold-Shrink Sleeves

Heat Shrink
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.
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
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. 449-143
Mfr. Part No.901-10193
1 Reel of 5 Metre(s)
4.8mm 2.4mm Black Heat Shrink - 2:1 5m Cross Linked Polyolefin Yes - TCN20 -
RS Stock No. 730-4700
Mfr. Part No.416-00002 PEC-9/3-PO-X-BK (50)
1 Bag of 50
9mm 3mm Black Heat Shrink Yes 3:1 27mm Polyolefin Yes - PEC -
RS Stock No. 873-9191
Mfr. Part No.TFER-5/8-X-STK
15.9mm 4.5mm Clear Heat Shrink No 3.2:1 1.2m PTFE Yes Yes TFER ASTM D 876-00, ASTM D2671, Class 5, Def. Stan. 59-97 Type 5B, IEC 60243, Military AMS-DTL-23053/12 Class 3, Raychem RW-2054
RS Stock No. 122-3479
Mfr. Part No.DWFR-8/2-0-STK
Each (In a Pack of 25)
8mm 2mm Black Heat Shrink Yes 4:1 1.2m Polyolefin Yes No DWFR -
RS Stock No. 712-3633
Mfr. Part No.308-30611 HIS-3-BAG-6/2-PO-X-RD (10)
Each (In a Bag of 10)
6mm 2mm Red Heat Shrink - 3:1 200mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 181-6794
Mfr. Part No.317-00037 TG40-6/1.27 50mm-PO-X-CL (10000)
1 Bag of 100
6mm 1.27mm Clear Heat Shrink Yes 4:1 50mm - Yes - TG40 -
RS Stock No. 639-3538
Mfr. Part No.319-01200 TREDUX-12/4-PO-X-BK (10)
12mm 4mm Black Heat Shrink - 3:1 1m Cross Linked Polyolefin Yes - TREDUX -
RS Stock No. 832-7025
Mfr. Part No.333-32400 TF31-24/8-PO-X-BK (30)
1 Reel of 30 Metre(s)
24mm 8mm Black Heat Shrink - 3:1 30m Polyolefin Yes - TF31 -
RS Stock No. 763-0951
Mfr. Part No.450-20002 RMS 43-10-PO-X-BK (1000.0)
43mm 10mm Black Heat Shrink Yes 4.5:1 1m POX - - RMS -
RS Stock No. 2508561137
Mfr. Part No.FP301 3/64-3/16AST
1 Pack of 30
- - - - - - - - - - - -
RS Stock No. 2508563616
Mfr. Part No.EPS200 1/2 6"
1 Pack of 14
- - - - - - - - - - - -
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