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. 177-9224
Mfr. Part No.RNF 3000-3/1-5-2
TWD166.00
Each
units
3mm 1mm Green Heat Shrink No 3:1 1.2 m Polyolefin Yes No RNF-3000 UL
RS Stock No. 811-2741
Mfr. Part No.8428-6
Brand3M
TWD806.00
Each
units
49.3mm 24mm Black Cold Shrink - - 152 mm Silicone Rubber - - 8420 -
RS Stock No. 866-0029
Mfr. Part No.LSTT-2.4-9-SP
TWD10,464.00
1 Reel of 300 Metre(s)
Reel(s)
2.4mm 1.2mm White Heat Shrink No 2:1 300 m Polyolefin No No LSTT -
RS Stock No. 447-412
Mfr. Part No.308-10300 HIS-A-3/1-PO-X-BK (10)
TWD130.80
Each
units
3mm 1mm Black Heat Shrink Yes 3:1 10 m Cross Linked Polyolefin Yes - HIS-A -
RS Stock No. 181-6791
Mfr. Part No.317-00034 TG40-6/1.27 50mm-PO-X-BK (10000)
TWD579.00
1 Bag of 100
Bag(s)
6mm 1.27mm Black Heat Shrink Yes 4:1 50 mm - Yes - TG40 -
RS Stock No. 208-8428
Mfr. Part No.HSB 125-C
TWD1,043.00
Each
units
3.2mm 1.6mm Clear Heat Shrink - 2:1 11.5 m Cross Linked Polyolefin Yes - - -
RS Stock No. 700-4715
BrandRS PRO
TWD597.00
1 Reel of 8 Metre(s)
Reel(s)
6.4mm 3.2mm Yellow Heat Shrink No 2:1 8 m Polyolefin Yes No - UL
RS Stock No. 712-3591
Mfr. Part No.308-30163 HIS-3-BAG-1.5/0.5-PO-X-BN (10)
TWD20.80
Each (In a Bag of 10)
units
1.5mm 0.5mm Brown Heat Shrink - 3:1 200 mm Cross Linked Polyolefin Yes - HIS-3 BAG -
RS Stock No. 483-4318
BrandRS PRO
TWD262.60
Each (In a Pack of 5)
units
25.4mm 12.7mm Brown Heat Shrink No 2:1 1.2 m Polyolefin Yes No - BS3G 198 Part 3 11B, CSA C22.2 No. 198.1, IEC 60684-3-212 A&B, MIL SAE-AMS-DTL 23053/5 Class 1, RoHS Compliant, UL 224 VW-1 E48762, VG 95343 Part 5 A&B
RS Stock No. 170-3299
Mfr. Part No.F6213 BK072
BrandAlpha Wire
TWD2,936.00
Each
units
76.2mm 19mm Black Heat Shrink Yes 5.6:1 152 mm Polyolefin - - FIT-621 -
RS Stock No. 122-3479
Mfr. Part No.DWFR-8/2-0-STK
TWD228.00
Each (In a Pack of 25)
units
8mm 2mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No DWFR -
RS Stock No. 366-2881
Mfr. Part No.DSPL-NR3-X-65MM
TWD705.00
1 Bag of 100
Bag(s)
10.8mm 2.4mm Clear Heat Shrink Yes 4:1 65 mm Polyolefin Yes No DSPL -
RS Stock No. 894-7913
Mfr. Part No.RNF-100-2-0-SP
TWD10,436.00
1 Reel of 30
Reel(s)
50.8mm 25.4mm Black Heat Shrink No 2:1 1.2 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. 181-6796
Mfr. Part No.317-00039 TG40-12/2.41 65mm-PO-X-CL (2500)
TWD755.00
1 Bag of 100
Bag(s)
12mm 2.41mm Clear Heat Shrink Yes 4:1 65 mm - Yes - TG40 -
RS Stock No. 341-6026
Mfr. Part No.RNF-100-3/4-6-STK
TWD172.00
Each
units
19mm 9.5mm Blue Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 398-256
BrandRS PRO
TWD264.60
Each (In a Pack of 5)
units
25.4mm 12.7mm Red Heat Shrink No 2:1 1.2 m Polyolefin Yes No - -
RS Stock No. 100-3909
Mfr. Part No.DR-25-TW-3/32-0-SP
TWD23,945.00
1 Reel of 150
Reel(s)
2.4mm 1.2mm Black Heat Shrink No 2:1 150 m Elastomer Yes No DR-25-TW ELV, EU, RK-6008/2, VG 95343 Part 5 Type D
RS Stock No. 821-4872
Mfr. Part No.F2211/2 BL016
BrandAlpha Wire
TWD3,095.00
1 Reel of 46 Metre(s)
Reel(s)
12.7mm 6mm Blue Heat Shrink No 2:1 45 m Polyolefin - No FIT-221 CSA, UL
RS Stock No. 433-0585
Mfr. Part No.ATUM-16/4-2-STK
TWD557.00
Each
units
16mm 4mm Red Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No ATUM -
RS Stock No. 397-815
Mfr. Part No.SCL-3/16-0
TWD230.60
Each (In a Pack of 5)
units
4.8mm 1.5mm Black Heat Shrink No 3:1 300 mm Polyolefin No No SCL -