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. 399-669
BrandRS PRO
TWD599.80
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. 821-4875
Mfr. Part No.F2211/2 BK016
BrandAlpha Wire
TWD3,144.00
1 Reel of 46 Metre(s)
Reel(s)
12.7mm 6mm Black Heat Shrink No 2:1 45 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 187-1429
Mfr. Part No.342-10030 PST-H-9.5/4.8-POA-BK (25)
TWD192.50
Each
units
9.5mm 4.8mm Black Heat Shrink - 2:1 25 m - - - PST-H VG95343 Type D
RS Stock No. 873-9141
Mfr. Part No.CGPT-51/26-6-SP
TWD16,860.00
1 Reel of 30
Reel(s)
51mm 26mm Blue Heat Shrink No 2:1 30 m Polyolefin Yes Yes CGPT ASTM D2671, CSA LR31929, IEC 243, Raychem RW-2059, UL Recognized E35586
RS Stock No. 170-6557
Mfr. Part No.RNF-100-1-9-STK
TWD220.00
Each
units
25.4mm 12.7mm White Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 157-3846
Mfr. Part No.DWTC-4/1-X-STK
TWD272.00
Each
units
4mm 1mm Clear Heat Shrink Yes 4:1 1.2 m Polyolefin No No DWTC -
RS Stock No. 712-3646
Mfr. Part No.308-31210 HIS-3-BAG-12/4-PO-X-BK (10)
TWD47.00
Each (In a Bag of 10)
units
12mm 4mm Black Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 267-2023
BrandRS PRO
TWD658.00
1 Bag of 1
Bag(s)
19.1mm 9.5mm Yellow Heat Shrink No 2:1 1.2 m Polyolefin Yes Yes - BS3G 198 Part 3 Type 15, DEF 59-97 Issue3 Type 8, E1042-A6-March 2002, IEC 60684-3-216 Type C, RoHS Compliant
RS Stock No. 316-1091
Mfr. Part No.HRSR-200FR-10
TWD1,520.00
Each
units
50.8mm 9.52mm Black Heat Shrink No 5.6:1 254 mm Polyolefin Yes No HRSR -
RS Stock No. 241-7602
BrandRS PRO
TWD1,032.00
Each
units
40mm 13mm Red 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. 364-1272
Mfr. Part No.RNF-100-1-5-STK
TWD301.00
Each
units
25.4mm 12.7mm Green Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 817-9075
Mfr. Part No.F221L1/4 BK004
BrandAlpha Wire
TWD12,487.00
1 Reel of 61 Metre(s)
Reel(s)
6.3mm 3mm Black Heat Shrink - 2:1 60.9 m LSZH Polyolefin - - FIT-221L -
RS Stock No. 487-4243
Mfr. Part No.RNF-100-1/8-1-STK
TWD106.00
Each
units
3.2mm 1.6mm Brown Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 252-7664
Mfr. Part No.VFRS-1/16-0
TWD56.30
Each
units
1.8mm 0.8mm Black Heat Shrink No 2:1 10 m Polyolefin Yes No VERSAFIT -
RS Stock No. 818-7940
Mfr. Part No.98-WT21-2542
BrandKroy
TWD3,157.00
Each
units
25.4mm - White Heat Shrink - 2:1 30 m Polyolefin Yes - - -
RS Stock No. 818-7981
Mfr. Part No.91-WT31-0942
BrandKroy
TWD5,922.00
Each
units
9.5mm - White Heat Shrink - 3:1 55 m Polyolefin Yes - - -
RS Stock No. 700-4469
BrandRS PRO
TWD515.00
1 Reel of 4 Metre(s)
Reel(s)
12mm 4mm Clear Heat Shrink No 3:1 4 m Polyolefin No No - UL
RS Stock No. 316-1625
Mfr. Part No.ATUM-4/1-0
TWD336.00
Each
units
4mm 1mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No ATUM -
RS Stock No. 712-3630
Mfr. Part No.308-30613 HIS-3-BAG-6/2-PO-X-GY (10)
TWD35.30
Each (In a Bag of 10)
units
6mm 2mm Grey Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 839-5514
Mfr. Part No.F2211IN BK105
BrandAlpha Wire
TWD921.00
1 Box of 5
Box(es)
25.4mm 12.7mm Black Heat Shrink No 2:1 1.2 m Cross Linked Polyolefin Yes No FIT-221 CSA, UL