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. 821-4991
Mfr. Part No.FITFAB-1 BK007
BrandAlpha Wire
HK$954.24
1 Reel of 15 Metre(s)
Reel(s)
11.9mm 6mm Black Heat Shrink No 2:1 15 m Polyethylene/Polyester Yes Yes FIT-FABRIC UL
RS Stock No. 821-4755
Mfr. Part No.F2213/32 BK002
BrandAlpha Wire
HK$1,242.47
1 Reel of 152 Metre(s)
Reel(s)
2.3mm 1mm Black Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 839-5466
Mfr. Part No.F2213/32 BK103
BrandAlpha Wire
HK$261.25
1 Box of 25
Box(es)
2.3mm 1.17mm Black Heat Shrink No 2:1 1.2 m Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 821-4761
Mfr. Part No.F2213/32 GR002
BrandAlpha Wire
HK$1,118.22
1 Reel of 152 Metre(s)
Reel(s)
2.3mm 1mm Green Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 839-5463
Mfr. Part No.F2213/32 BK061
BrandAlpha Wire
HK$3.841
Each
units
2.3mm 1.17mm Black Heat Shrink No 2:1 152 mm Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 821-4935
Mfr. Part No.F2211IN WH003
BrandAlpha Wire
HK$2,215.96
1 Reel of 76 Metre(s)
Reel(s)
25.4mm 13mm White Heat Shrink No 2:1 76 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 821-4718
Mfr. Part No.FKIT221C MC032
BrandAlpha Wire
HK$683.99
1 Kit
Kit(s)
Assortiment Assortiment Assorted Heat Shrink - 2:1 Assortiment Polyolefin - - FIT-KIT -
RS Stock No. 839-5485
Mfr. Part No.F2211/4 BK064
BrandAlpha Wire
HK$7.348
Each
units
6.3mm 3.18mm Black Heat Shrink No 2:1 152 mm Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 181-8965
Mfr. Part No.F4008 NA103
BrandAlpha Wire
HK$2,743.03
1 Bag of 25
Bag(s)
4.57mm 3.63mm Natural Heat Shrink - 1.2:1 1.2 m FEP Yes - FIT-400 AMS-DTL-23053/11 Class 1, EC 1907/2006, EU Directive 2011/65, UL 94V-0
RS Stock No. 821-4774
Mfr. Part No.F2213/32 WH002
BrandAlpha Wire
HK$1,242.47
1 Reel of 152 Metre(s)
Reel(s)
2.3mm 1mm White Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 821-4759
Mfr. Part No.F2213/32 CL002
BrandAlpha Wire
HK$1,242.47
1 Reel of 152 Metre(s)
Reel(s)
2.3mm 1mm Clear Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 821-4709
Mfr. Part No.FKIT221BK BK032
BrandAlpha Wire
HK$635.53
1 Kit
Kit(s)
Assortiment Assortiment Black Heat Shrink - 2:1 Assortiment Polyolefin - - FIT-KIT -
RS Stock No. 821-4967
Mfr. Part No.F2603/8 GY003
BrandAlpha Wire
HK$3,479.19
1 Reel of 76 Metre(s)
Reel(s)
9.5mm 5mm Green/Yellow Heat Shrink No 2:1 76 m Polyolefin - No FIT-260 CSA, UL
RS Stock No. 817-9081
Mfr. Part No.F221L3/4 BK004
BrandAlpha Wire
HK$4,113.62
1 Reel of 61 Metre(s)
Reel(s)
19mm 10mm Black Heat Shrink - 2:1 60.9 m LSZH Polyolefin - - FIT-221L -
RS Stock No. 839-5472
Mfr. Part No.F2213/16 BK063
BrandAlpha Wire
HK$6.12
Each (In a Pack of 24)
units
4.7mm 2.36mm Black Heat Shrink No 2:1 152 mm Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 821-4939
Mfr. Part No.F2211IN YL003
BrandAlpha Wire
HK$2,215.96
1 Reel of 76 Metre(s)
Reel(s)
25.4mm 13mm Yellow Heat Shrink No 2:1 76 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 821-4780
Mfr. Part No.F2211/8 CL002
BrandAlpha Wire
HK$1,347.32
1 Reel of 152 Metre(s)
Reel(s)
3.1mm 2mm Clear Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 181-8954
Mfr. Part No.F40016 NA103
BrandAlpha Wire
HK$1,679.66
1 Bag of 25
Bag(s)
1.91mm 1.55mm Natural Heat Shrink - 1.2:1 1.2 m FEP Yes - FIT-400 AMS-DTL-23053/11 Class 1, EC 1907/2006, EU Directive 2011/65, UL 94V-0
RS Stock No. 839-5488
Mfr. Part No.F2211/4 BK103
BrandAlpha Wire
HK$423.85
1 Box of 25
Box(es)
6.3mm 3.18mm Black Heat Shrink No 2:1 152 mm Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 839-5523
Mfr. Part No.F2212IN BK105
BrandAlpha Wire
HK$712.59
1 Box of 5
Box(es)
50.8mm 25.4mm Black Heat Shrink No 2:1 - Cross Linked Polyolefin Yes No FIT-221 CSA, UL