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$963.69
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. 821-4761
Mfr. Part No.F2213/32 GR002
BrandAlpha Wire
HK$1,243.64
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. 821-4755
Mfr. Part No.F2213/32 BK002
BrandAlpha Wire
HK$1,243.64
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$266.32
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. 839-5463
Mfr. Part No.F2213/32 BK061
BrandAlpha Wire
HK$4.708
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. 821-4705
Mfr. Part No.F221MS/2 BK032
BrandAlpha Wire
HK$429.75
Each
units
6.35 mm, 9.53 mm, 12.7 mm, 19.05 mm 3 mm, 5 mm, 6 mm, 10 mm Black Heat Shrink - 2:1 152 mm Polyolefin - - FIT-221 -
RS Stock No. 181-8957
Mfr. Part No.F40020 NA103
BrandAlpha Wire
HK$1,907.40
1 Bag of 25
Bag(s)
1.14mm 0.99mm 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. 839-5511
Mfr. Part No.F22111/2 BK105
BrandAlpha Wire
HK$512.97
1 Box of 5
Box(es)
38.1mm 19.05mm Black Heat Shrink No 2:1 1.2 m Cross Linked Polyolefin Yes No FIT-221 CSA, UL
RS Stock No. 181-8958
Mfr. Part No.F40022 NA103
BrandAlpha Wire
HK$1,481.82
1 Bag of 25
Bag(s)
0.91mm 0.81mm 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. 821-4783
Mfr. Part No.F2211/8 BL002
BrandAlpha Wire
HK$1,315.14
1 Reel of 152 Metre(s)
Reel(s)
3.1mm 2mm Blue Heat Shrink No 2:1 152 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 821-4985
Mfr. Part No.FFLEX3 SL008
BrandAlpha Wire
HK$3,759.53
1 Reel of 8 Metre(s)
Reel(s)
- - Grey - - - 8 m Silicone Rubber - - FIT-FLEX -
RS Stock No. 817-9056
Mfr. Part No.F221L3/64 BK001
BrandAlpha Wire
HK$5,613.15
1 Reel of 304 Metre(s)
Reel(s)
1.1mm 1mm Black Heat Shrink - 2:1 304.8 m LSZH Polyolefin - - FIT-221L -
RS Stock No. 113-1981
Mfr. Part No.F6215/8 BK072
BrandAlpha Wire
HK$374.60
Each
units
15.2mm 3.81mm Black Heat Shrink Yes 5.6:1 152 mm Polyolefin - - FIT-621 -
RS Stock No. 181-8980
Mfr. Part No.F6001IN BK008
BrandAlpha Wire
HK$2,246.82
1 Reel of 7 Metre(s)
Reel(s)
25.4mm 14.48mm Black Heat Shrink - 2:1 7.6 m Chlorinated Polyolefin Yes - FIT-600 AMS-DTL-23053/1 Class 1 & 2, EC 1907/2006, EU Directive 2011/65
RS Stock No. 839-5514
Mfr. Part No.F2211IN BK105
BrandAlpha Wire
HK$234.29
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
RS Stock No. 181-8962
Mfr. Part No.F4005 NA112
BrandAlpha Wire
HK$4,143.17
1 Bag of 50
Bag(s)
6.3mm 5.03mm Natural Heat Shrink - 1.2:1 0.6 m FEP Yes - FIT-400 AMS-DTL-23053/11 Class 1, EC 1907/2006, EU Directive 2011/65, UL 94V-0
RS Stock No. 839-5460
Mfr. Part No.F2211/8 BK062
BrandAlpha Wire
HK$5.381
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. 181-8982
Mfr. Part No.F6002IN BK008
BrandAlpha Wire
HK$5,171.91
1 Reel of 7 Metre(s)
Reel(s)
50.8mm 28.96mm Black Heat Shrink - 2:1 7.6 m Chlorinated Polyolefin Yes - FIT-600 AMS-DTL-23053/1 Class 1 & 2, EC 1907/2006, EU Directive 2011/65
RS Stock No. 817-9084
Mfr. Part No.F221L1IN BK004
BrandAlpha Wire
HK$6,975.65
1 Reel of 61 Metre(s)
Reel(s)
25.4mm 13mm Black Heat Shrink - 2:1 60.9 m LSZH Polyolefin - - FIT-221L -
RS Stock No. 821-4737
Mfr. Part No.F2211/16 BL001
BrandAlpha Wire
HK$1,966.88
1 Reel of 305 Metre(s)
Reel(s)
1.6mm 1mm Blue Heat Shrink No 2:1 305 m Polyolefin - No FIT-221 CSA, UL