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. 170-6614
Mfr. Part No.RNF-100-3/16-X-STK
TWD91.00
Each
units
4.8mm 2.4mm Clear Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 157-3852
Mfr. Part No.DWTC-8/2-X-STK
TWD443.00
Each
units
8mm 2mm Clear Heat Shrink Yes 4:1 1.2 m Polyolefin No No DWTC -
RS Stock No. 342-7329
Mfr. Part No.CRN-1/4-0-STK
TWD546.00
Each
units
6.4mm 3.2mm Black Heat Shrink No 2:1 1.2 m Polyolefin Yes No CRN -
RS Stock No. 157-3795
Mfr. Part No.CGAT-6/2-0
TWD210.00
Each
units
6mm 2mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 157-3824
Mfr. Part No.CGAT-18/6-0
TWD422.00
Each
units
18mm 6mm Black Heat Shrink Yes 3:1 1.2 m Polyolefin Yes No CGAT E85381
RS Stock No. 397-821
Mfr. Part No.SCL-1/4-0
TWD143.60
Each (In a Pack of 5)
units
6.4mm 2mm Black Heat Shrink No 3:1 300 mm Polyolefin No No SCL -
RS Stock No. 170-6507
Mfr. Part No.RNF-100-1/4-9-STK
TWD120.00
Each
units
6.4mm 3.2mm White Heat Shrink No 2:1 1.2 m Polyolefin Yes No RNF-100 -
RS Stock No. 288-5263
Mfr. Part No.RT-375-1-X-STK
TWD575.00
Each
units
25.4mm 12.7mm Clear Heat Shrink No 2:1 1.2 m Fluoropolymer Yes No RT-375 -
RS Stock No. 433-0579
Mfr. Part No.ATUM-12/3-2-STK
TWD577.00
Each
units
12mm 3mm Red Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No ATUM -
RS Stock No. 170-6311
Mfr. Part No.TFER-1/2-X
TWD1,231.00
Each
units
12.7mm 3.7mm Clear Heat Shrink No 3.2:1 1.2 m Teflon Fluoropolymer Yes No TFER ASTM D 876-00, ASTM D2671, Class 5, Def. Stan. 59-97 Type 5B, IEC 60243, Military AMS-DTL-23053/12 Class 3, Raychem RW-2054
RS Stock No. 288-5207
Mfr. Part No.RT-375-3/16-X-STK
TWD196.00
Each
units
4.8mm 2.4mm Clear Heat Shrink No 2:1 1.2 m Fluoropolymer Yes No RT-375 -
RS Stock No. 306-4417
Mfr. Part No.ZH-100-1/2-0
TWD200.00
Each
units
12.7mm 6.4mm Black Heat Shrink No 2:1 1.2 m Polyolefin Yes Yes ZH-100 -
RS Stock No. 277-7926
Mfr. Part No.RW-175-3/16-X
TWD244.00
Each
units
4.8mm 2.4mm Clear Heat Shrink No 2:1 1.2 m PVDF Yes No KYNAR -
RS Stock No. 894-7982
Mfr. Part No.Versafit-1/2-0-SP-SM
TWD6,878.00
1 Reel of 45 Metre(s)
Reel(s)
12.7mm 6.4mm Black Heat Shrink No 2:1 45 m Polyolefin No No VERSAFIT AMS-DTL-23053/5, CSA, E35586 VW-1, LR31929 VW-1, MIL-DTL-23053/5, MIL-I-23053/5, RoHS Complaint, RW-3009, UL Recognisation
RS Stock No. 433-0765
Mfr. Part No.RW-175-1/2-0-RSU-STK
TWD500.00
Each
units
12.7mm 6.4mm Black Heat Shrink No 2:1 1.2 m PVDF Yes No RW-175 -
RS Stock No. 396-4660
Mfr. Part No.RNF-100-1-0-FSP
TWD12,382.00
1 Reel of 60
Reel(s)
25.4mm 12.7mm Black Heat Shrink No 2:1 60 m Polyolefin Yes No RNF-100 -
RS Stock No. 874-0973
Mfr. Part No.RBK-ILS-125-NR2-0-50MM
TWD7.00
Each (In a Pack of 100)
units
7.5mm 1.65mm Black Heat Shrink Yes 4:1 50 mm Polyolefin Yes Yes RBK-ILS-125 ELV, RoHS Compliant
RS Stock No. 288-5235
Mfr. Part No.RT-375-1/2-X-STK
TWD222.00
Each
units
12.7mm 6.4mm Clear Heat Shrink No 2:1 1.2 m Fluoropolymer Yes No RT-375 -
RS Stock No. 252-7721
Mfr. Part No.VFRS-1/2-0
TWD673.00
1 Reel of 6 Metre(s)
Reel(s)
12.7mm 6.4mm Black Heat Shrink No 2:1 6 m Polyolefin Yes No VERSAFIT -
RS Stock No. 316-1647
Mfr. Part No.ATUM-12/3-0
TWD493.00
Each
units
12mm 3mm Black Heat Shrink Yes 4:1 1.2 m Polyolefin Yes No ATUM -