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. 763-0954
Mfr. Part No.450-20004 RMS 43-10-PO-X-BK (750.0)
$99.06
Each
units
43mm 10mm Black Heat Shrink Yes 4.5:1 750mm POX - - RMS -
RS Stock No. 251-7588
Mfr. Part No.8426-9
Brand3M
$45.74
Each
units
30.1mm 13.9mm Black Cold Shrink - - 229mm EPR - - 8420 -
RS Stock No. 811-2744
Mfr. Part No.8428-18
Brand3M
$100.86
Each
units
49.3mm 24mm Black Cold Shrink - - 457mm Silicone Rubber - - 8420 -
RS Stock No. 147-174
Mfr. Part No.202K153-25/225-CS-2065-0
$28.53
Each
units
- 5.59mm Black - Yes - - Fluid Resistant Elastomer - - 202K1 -
RS Stock No. 396-4654
Mfr. Part No.RNF-100-3/4-0-FSP
$279.30
1 Reel of 60
Reel(s)
19mm 9.5mm Black Heat Shrink No 2:1 60m Polyolefin Yes No RNF-100 -
RS Stock No. 364-2528
Mfr. Part No.PTCM-9/1.5-X-STK
$27.27
Each
units
9mm 1.5mm Clear Heat Shrink Yes 6:1 1.2m Polyolefin No No PTCM -
RS Stock No. 170-6507
Mfr. Part No.RNF-100-1/4-9-STK
$6.17
Each
units
6.4mm 3.2mm White Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 487-4344
Mfr. Part No.RNF-100-1/8-8-STK
$4.93
Each
units
3.2mm 1.6mm Grey Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 288-5241
Mfr. Part No.RT-375-3/4-X-STK
$14.71
Each
units
19.1mm 9.5mm Clear Heat Shrink No 2:1 1.2m Fluoropolymer Yes No RT-375 -
RS Stock No. 316-1681
Mfr. Part No.ATUM-52/13-0
$124.07
Each
units
52mm 13mm Black Heat Shrink Yes 4:1 1.2m Polyolefin Yes No ATUM -
RS Stock No. 763-0982
Mfr. Part No.450-20031 RMS 100-30-PO-X-BK (1000.0)
$90.19
Each
units
100mm 30mm Black Heat Shrink Yes 4.5:1 1m POX - - RMS -
RS Stock No. 894-7907
Mfr. Part No.RNF-100-3/4-0-SP
$733.50
1 Reel of 150
Reel(s)
19.1mm 9.5mm Black Heat Shrink No 2:1 1.2m 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. 234-4964
Mfr. Part No.RNF 3000-6/2-4
$7.39
Each
units
6mm 2mm Yellow Heat Shrink No 3:1 1.2m Polyolefin Yes No RNF-3000 UL
RS Stock No. 341-5900
Mfr. Part No.RNF-100-1/8-2-STK
$4.80
Each
units
3.2mm 1.6mm Red Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
RS Stock No. 914-6802
Mfr. Part No.318-40400 TA42-4/1-PO-X-BK (250)
$8.62
Each
units
4mm 1mm Black Heat Shrink Yes 4:1 1.2m Polyolefin Yes - TA42 CSA, SAE, UL Listed, UL Recognized
RS Stock No. 821-4957
Mfr. Part No.F2213IN BK005
BrandAlpha Wire
$1,171.04
1 Reel of 30 Metre(s)
Reel(s)
76.2mm 38mm Black Heat Shrink No 2:1 30m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 712-3579
Mfr. Part No.308-31216 HIS-3-BAG-12/4-PO-X-MIX (15)
$23.57
1 Bag of 15
Bag(s)
12.4mm 4mm Assorted Heat Shrink - 3:1 200mm Polyolefin Yes - HIS-3 BAG -
RS Stock No. 333-6352
Mfr. Part No.202A132-25-0
$24.29
Each
units
- 6.6mm Black Heat Shrink - - 51.3mm - - - 202A1 -
RS Stock No. 208-8642
Mfr. Part No.HSB 750-C
$50.03
Each
units
19.1mm 9.5mm Clear Heat Shrink - 2:1 5m Cross Linked Polyolefin Yes - Shrink-Kon -
RS Stock No. 341-6010
Mfr. Part No.RNF-100-3/4-2-STK
$11.27
Each
units
19mm 9.5mm Red Heat Shrink No 2:1 1.2m Polyolefin Yes No RNF-100 -
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