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.
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. 639-3617
Mfr. Part No.321-50130 TREDUX-HA47-13/4-PO-X-BK (6)
TWD708.00
Each
units
13mm 4mm Black Heat Shrink Yes 3.5:1 1 m Cross Linked Polyolefin Yes - TREDUX-HA47 -
RS Stock No. 914-6818
Mfr. Part No.318-41600 TA42-16/4-PO-X-BK (125)
TWD467.00
Each
units
16mm 4mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes - TA42 CSA, SAE, UL Listed, UL Recognized
RS Stock No. 449-143
Mfr. Part No.901-10193
TWD392.00
1 Reel of 5 Metre(s)
Reel(s)
4.8mm 2.4mm Black Heat Shrink - 2:1 5 m Cross Linked Polyolefin Yes - TCN20 -
RS Stock No. 450-553
Mfr. Part No.323-20500 MA47-50/16
TWD894.00
Each
units
50mm 16mm Black Heat Shrink Yes 4:1 1 m Cross Linked Polyolefin - - MA47 -
RS Stock No. 448-263
Mfr. Part No.901-10158
TWD2,992.00
1 Reel of 5 Metre(s)
Reel(s)
9mm 3mm Black Heat Shrink - 3:1 5 m Cross Linked Polyolefin Yes - HIS-3 -
RS Stock No. 832-6978
Mfr. Part No.318-30600 TA32-6/2-PO-X-BK (250)
TWD129.60
Each (In a Pack of 5)
units
6mm 2mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes - TA32 -
RS Stock No. 712-3614
Mfr. Part No.308-30313 HIS-3-BAG-3/1-PO-X-GY (10)
TWD22.90
Each (In a Bag of 10)
units
3mm 1mm Grey Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3618
Mfr. Part No.308-30314 HIS-3-BAG-3/1-PO-X-BN (10)
TWD22.90
Each (In a Bag of 10)
units
3mm 1mm Brown Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3649
Mfr. Part No.308-30614 HIS-3-BAG-6/2-PO-X-BN (10)
TWD34.50
Each (In a Bag of 10)
units
6mm 2mm Brown Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3620
Mfr. Part No.308-30316 HIS-3-BAG-3/1-PO-X-GNYE (10)
TWD26.50
Each (In a Bag of 10)
units
3mm 1mm Green/Yellow Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3652
Mfr. Part No.308-31213 HIS-3-BAG-12/4-PO-X-GY (10)
TWD40.40
Each (In a Bag of 10)
units
12mm 4mm Grey Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3624
Mfr. Part No.308-30610 HIS-3-BAG-6/2-PO-X-BK (10)
TWD45.70
Each (In a Bag of 10)
units
6mm 2mm Black Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 712-3655
Mfr. Part No.308-31211 HIS-3-BAG-12/4-PO-X-RD (10)
TWD46.90
Each (In a Bag of 10)
units
12mm 4mm Red Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 133-1779
Mfr. Part No.313-80002 TCN24-4.8/2.4-PO-X-CL
TWD1,408.00
1 Box of 24
Box(es)
4.8mm 2.4mm Clear Heat Shrink - 2:1 1 m Polyolefin Yes - TCN24 -
RS Stock No. 133-1767
Mfr. Part No.300-73592 TCN20 76.2/38.1-PO-X-BK
TWD3,550.00
1 Box of 3
Box(es)
76mm 38mm Black Heat Shrink - 2:1 1 m Polyolefin Yes - TCN20 CSA, CULus Recognised, E 143529, UL 224 VW-1
RS Stock No. 181-6794
Mfr. Part No.317-00037 TG40-6/1.27 50mm-PO-X-CL (10000)
TWD536.00
1 Bag of 100
Bag(s)
6mm 1.27mm Clear Heat Shrink Yes 4:1 50 mm - Yes - TG40 -
New
RS Stock No. 200-9708
Mfr. Part No.300-70115 TCN30-18/6-BK (5x1m)
TWD866.00
1 Box of 5
Box(es)
18mm 6mm Black - - 0.125694444 5 mm - - - TCN30 -
RS Stock No. 448-326
Mfr. Part No.901-10168
TWD437.00
Each
units
24mm 8mm Green/Yellow Heat Shrink - 3:1 1 m Cross Linked Polyolefin Yes - TREDUX -
RS Stock No. 763-0948
Mfr. Part No.450-20000 RMS 43-10-PO-X-BK (250.0)
TWD546.00
Each
units
43mm 10mm Black Heat Shrink Yes 4.5:1 250 mm POX - - RMS -
RS Stock No. 133-1768
Mfr. Part No.300-73596 TCN20 101.6/50.8-PO-X-BK
TWD2,696.00
1 Box of 2
Box(es)
101.6mm 50.8mm Black Heat Shrink - 2:1 1 m Polyolefin Yes - TCN20 CSA, CULus Recognised, E 143529, UL 224 VW-1