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. 244-0832
Mfr. Part No.DR-25-1/2-0-SP
HK$1,145.35
1 Reel of 30 Metre(s)
Reel(s)
12.7mm 6.4mm Black Heat Shrink No 2:1 30 m Elastomer Yes No DR-25 -
RS Stock No. 219-6529
Mfr. Part No.DR-25-1/2-0-7
HK$895.26
1 Reel of 7 Metre(s)
Reel(s)
12.7mm 6.4mm Black Heat Shrink No 2:1 7 m Elastomer Yes No DR-25 -
RS Stock No. 397-679
BrandRS PRO
HK$680.30
Each
units
2.4 mm, 3 mm, 3.2 mm, 4.8 mm, 6.4 mm, 9.5 mm, 12.7 mm Assortiment Black, Blue, Brown, Green/Yellow, Red, White, Yellow Heat Shrink Yes 2:1, 3:1 - Polyolefin Yes - - RoHS Compliant
RS Stock No. 515-6798
Mfr. Part No.18052
BrandDymo
HK$383.00
Each
units
6mm 1.2mm Yellow Heat Shrink - 3:1 1.5 m Polyolefin Yes - DYMO -
RS Stock No. 389-656
BrandRS PRO
HK$289.76
1 Reel of 20 Metre(s)
Reel(s)
4.8mm 2.4mm Black Heat Shrink No 2:1 20 m Polyolefin No No - ELV, RoHS Compliant, SFP (R4-0580)
RS Stock No. 277-7932
Mfr. Part No.RW-175-1/4-X
HK$59.59
Each
units
6.4mm 3.2mm Clear Heat Shrink No 2:1 1.2 m PVDF Yes No KYNAR -
RS Stock No. 487-3852
BrandRS PRO
HK$773.58
Each
units
Assorted Assorted Assorted Heat Shrink Yes 2:1, 3:1 Assorted Lengths Polyolefin Yes - - RoHS Compliant
RS Stock No. 113-2596
Mfr. Part No.RNF 100 KIT
HK$1,381.61
Each
units
2.4 mm, 3.2 mm, 4.8 mm, 6.4 mm, 9.5 mm Assortiment Black Heat Shrink No 2:1 Longueurs assorties Polyolefin Yes No RNF-100 -
RS Stock No. 894-7884
Mfr. Part No.RNF-100-3/32-0-SP
HK$3,645.00
1 Reel of 300
Reel(s)
2.4mm 1.2mm Black Heat Shrink No 2:1 300 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. 170-6377
Mfr. Part No.RNF-100-3/32-0-STK
HK$14.52
Each
units
2.4mm 1.2mm Black Heat Shrink No 2:1 1.2 m Polyolefin No No RNF-100 -
RS Stock No. 700-4541
BrandRS PRO
HK$99.87
1 Reel of 3 Metre(s)
Reel(s)
18mm 6mm Black Heat Shrink No 3:1 3 m Polyolefin Yes No - UL
RS Stock No. 700-4532
BrandRS PRO
HK$98.45
1 Reel of 10 Metre(s)
Reel(s)
3mm 1mm Black Heat Shrink No 3:1 10 m Polyolefin Yes No - UL
RS Stock No. 515-6805
Mfr. Part No.18054
BrandDymo
HK$495.31
Each
units
9mm 1.7mm Yellow Heat Shrink No 3:1 1.5 m Polyolefin Yes - DYMO -
RS Stock No. 700-4535
BrandRS PRO
HK$105.17
1 Reel of 7 Metre(s)
Reel(s)
6mm 2mm Black Heat Shrink No 3:1 7 m Polyolefin Yes No - UL
RS Stock No. 515-6760
Mfr. Part No.18051
BrandDymo
HK$261.94
Each
units
6mm 1.2mm White Heat Shrink No 3:1 1.5 m Polyolefin Yes - DYMO -
RS Stock No. 170-6399
Mfr. Part No.RNF-100-3/16-0-STK
HK$18.40
Each
units
4.8mm 2.4mm Black Heat Shrink No 2:1 1.2 m Polyolefin No No RNF-100 -
RS Stock No. 700-4507
BrandRS PRO
HK$106.28
1 Reel of 3 Metre(s)
Reel(s)
18mm 6mm Blue Heat Shrink No 3:1 3 m Polyolefin Yes No - UL
RS Stock No. 894-7881
Mfr. Part No.RNF-100-3/16-0-SP
HK$2,670.00
1 Reel of 300
Reel(s)
4.8mm 2.4mm Black Heat Shrink No 2:1 1.2 m Polyolefin No 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. 487-4265
Mfr. Part No.RNF-100-1/4-1-STK
HK$26.01
Each
units
6.4mm 3.2mm Brown Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 113-2439
Mfr. Part No.RNF-100-3/4-4-STK
HK$61.90
Each
units
19mm 9.5mm Yellow Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
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