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. 251-7651
Mfr. Part No.8443-2
Brand3M
TWD427.00
Each
units
17.3mm 2.8mm Grey Cold Shrink - - 39.6 mm Silicone Rubber Yes - 8440 -
RS Stock No. 252-7692
Mfr. Part No.VFRS-3/16-0
TWD520.00
1 Reel of 9 Metre(s)
Reel(s)
5.21mm 2.4mm Black Heat Shrink No 2:1 9 m Polyolefin Yes No VERSAFIT -
RS Stock No. 839-5460
Mfr. Part No.F2211/8 BK062
BrandAlpha Wire
TWD20.90
Each
units
3.1mm 1.57mm Black Heat Shrink No 2:1 152 mm Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 433-0771
Mfr. Part No.RW-175-3/4-0-RSU-STK
TWD968.00
Each
units
19.1mm 9.5mm Black Heat Shrink No 2:1 1.2 m PVDF Yes No RW-175 -
RS Stock No. 202-7704
Mfr. Part No.BSTS-17X4
TWD525.00
Each
units
43.1mm 12.7mm Black Heat Shrink No 3:1 1.2 m Polymer No No BSTS -
RS Stock No. 341-5966
Mfr. Part No.RNF-100-3/8-2-STK
TWD137.00
Each
units
9.5mm 4.8mm Red Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 194-6396
Mfr. Part No.311-00169
TWD70.00
Each
units
1.6mm 0.8mm Clear Heat Shrink - 2:1 1.2 m Polyvinylidene Fluoride - - TK20 -
RS Stock No. 873-9052
Mfr. Part No.CGPT-6.4/3.2-6-SP
TWD9,334.00
1 Reel of 150
Reel(s)
6.4mm 3.2mm Blue Heat Shrink No 2:1 150 m Polyolefin Yes Yes CGPT ASTM D2671, CSA LR31929, IEC 243, Raychem RW-2059, UL Recognized E35586
RS Stock No. 448-667
Mfr. Part No.901-10177
TWD2,993.00
1 Reel of 5 Metre(s)
Reel(s)
40mm 13mm Black Heat Shrink - 3:1 5 m Cross Linked Polyolefin Yes - TF31 -
RS Stock No. 341-5988
Mfr. Part No.RNF-100-3/8-6-STK
TWD129.00
Each
units
9.5mm 4.8mm Blue Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 241-7365
BrandRS PRO
TWD212.00
Each
units
6.4mm 2mm Yellow Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 288-5184
Mfr. Part No.RT-375-1/8-X-STK
TWD118.00
Each
units
3.2mm 1.6mm Clear Heat Shrink No 2:1 1.2 m Fluoropolymer Yes No RT-375 -
RS Stock No. 194-6397
Mfr. Part No.311-00249
TWD88.00
Each
units
2.4mm 1.2mm Clear Heat Shrink - 2:1 1.2 m Polyvinylidene Fluoride - - TK20 -
RS Stock No. 914-6805
Mfr. Part No.318-40800 TA42-8/2-PO-X-BK (125)
TWD381.00
Each
units
8mm 2mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes - TA42 CSA, SAE, UL Listed, UL Recognized
RS Stock No. 692-6554
Mfr. Part No.553-41809 TULT18-6WH-PO-X-WH (26)
TWD4,888.50
Each (In a Pack of 2)
units
18mm 6mm White Heat Shrink - 3:1 13 m Cross Linked Polyolefin Yes - TULT -
RS Stock No. 448-225
Mfr. Part No.901-10150
TWD559.00
1 Reel of 3 Metre(s)
Reel(s)
24mm 8mm Blue Heat Shrink - 3:1 3 m Cross Linked Polyolefin Yes - HIS-3 -
RS Stock No. 894-7957
Mfr. Part No.RNF-100-2-BK-SP
TWD14,089.00
1 Reel of 38
Reel(s)
50.8mm 25.4mm Black Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 AMS-DTL-23053/5, CSA, E35586, LR31929, MIL-DTL-23053/5, MIL-I-23053/5, RoHS Complaint, UL Recognisation, VDE 0341 Pt 9005
RS Stock No. 241-7371
BrandRS PRO
TWD212.00
Each
units
6.4mm 2mm Blue Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No - AMS-DTL-23053/4 Class 3, RoHS Compliant, UL 224 E75077 CSA C22.2 No.198.1
RS Stock No. 399-669
BrandRS PRO
TWD581.80
Each (In a Pack of 5)
units
50.8mm 25.4mm Yellow Heat Shrink No 2:1 1.2 m Polyolefin Yes No - -
RS Stock No. 113-2338
Mfr. Part No.RNF-100-2-0-STK
TWD346.00
Each
units
51mm 25.4mm Black Heat Shrink No 2:1 1.2 m Polyolefin No No RNF-100 -