Polyolefin and halogen-free heat-shrink tubing for insulation, protection, and identification
ROTIMA polyolefin heat-shrink tubing is used for electrical insulation, mechanical protection, color coding, cable identification, moisture protection, and corrosion protection. Depending on the model, thin-wall, medium-wall, and thick-wall versions are available—with or without an inner adhesive.
ROTIMA describes SFTW heat-shrink tubing in particular as highly flexible, tough, and radiation-crosslinked polyolefin tubing for electrical engineering, electronics, industry, the military, and the aerospace industry. Since 1964, ROTIMA has been synonymous with experience in the electrical engineering and electronics industries.
ROTIMA describes SFTW heat-shrink tubing in particular as highly flexible, tough, and radiation-crosslinked polyolefin tubing for electrical engineering, electronics, industry, the military, and the aerospace industry. Since 1964, ROTIMA has been synonymous with experience in the electrical engineering and electronics industries.
Over 60 years of experience
using halogen-free heat-shrink technology
Short delivery times
through optimized warehousing
Germany and Switzerland
Dual location strength and reliability
Why Polyolefin Heat-Shrink Tubing Is Important in Industrial Applications
At ROTIMA, polyolefin is the primary material used for many types of heat-shrink tubing. Standard thin-walled tubing is made of highly flexible, tough polyolefin; it is radiation-crosslinked and is used for protection, color-coding, or as a printed cable identification sleeve.
The most technically relevant specifications include shrink ratio, wall thickness, internal adhesive, continuous operating temperature, minimum shrink temperature, dielectric strength, longitudinal shrinkage, and flammability. These values vary significantly depending on the product family. Therefore, technical tables should be included only once, centrally on the page.
The product range includes heat-shrink tubing from super-thin to thick-walled, with short lead times thanks to optimized inventory management and a strong local presence in Germany and Switzerland.
Halogen-free heat-shrink tubing is manufactured without chlorine, fluorine, iodine, or bromine. They are used particularly in applications where personal safety, low smoke and corrosion risks, or high-value assets are critical—for example, in public buildings, hospitals, schools, data centers, elevator systems, public transportation, tunnel systems, or military applications.
The most technically relevant specifications include shrink ratio, wall thickness, internal adhesive, continuous operating temperature, minimum shrink temperature, dielectric strength, longitudinal shrinkage, and flammability. These values vary significantly depending on the product family. Therefore, technical tables should be included only once, centrally on the page.
The product range includes heat-shrink tubing from super-thin to thick-walled, with short lead times thanks to optimized inventory management and a strong local presence in Germany and Switzerland.
Halogen-free heat-shrink tubing is manufactured without chlorine, fluorine, iodine, or bromine. They are used particularly in applications where personal safety, low smoke and corrosion risks, or high-value assets are critical—for example, in public buildings, hospitals, schools, data centers, elevator systems, public transportation, tunnel systems, or military applications.
Technical Comparison Table of the Relevant Polyolefin Variants
| Variant | Wall | Glue | Shrinkage ratio | Continuous operating temperature | Minimum Shrinkage Temperature | Dielectric strength | Flammability / Halogens |
|---|---|---|---|---|---|---|---|
| SFTW | thin-walled | no | 2:1 | −55 to +135 °C | 135 °C | 21-45 kV/mm | self-extinguishing |
| GTI 3000 | thin-walled | no | 3:1 | −55 to +135 °C | 120 °C | 350 kV/cm | halogen-free, non-self-extinguishing |
| ETW-803 | thin-walled | Yes | 3:1 | −55 to +125 °C | 120 °C | 18 kV/mm | self-extinguishing |
| ETW-804 | thin-walled | Yes | 4:1 | −55 to +110 °C | 120 °C | 18 kV/mm | self-extinguishing |
| MDT | medium-walled | no | 4,5:1 | −55 to +130 °C | 135 °C | 16 kV/mm | self-extinguishing |
| MDT-A | medium-walled | Yes | 4,5:1 | −55 to +130 °C | 135 °C | 16 kV/mm | not self-extinguishing |
| HDT-A | thick-walled | Yes | 4,5:1 | −55 to +110 °C | 135 °C | 11 kV/mm | halogen-free, self-extinguishing |
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Polyolefin & halogen-free heat-shrink tubing
Polyolefin & halogen-free heat-shrink tubing
Thermal Activation and Processing
Shrinkage occurs when exposed to heat. Depending on the ROTIMA variant, the minimum shrinkage temperature ranges from 120 °C to 135 °C. SFTW, MDT, MDT-A, and HDT-A require a minimum of 135 °C; according to the data, GTI 3000, ETW-803, and ETW-804 begin shrinking at 120 °C.
Suitable heat sources for shrink applications include hot-air guns, heating cabinets, continuous-conveyor ovens, and ring heaters. To ensure reliable results, the tubing size, shrink ratio, wall thickness, component diameter, and temperature control must be coordinated.
Suitable heat sources for shrink applications include hot-air guns, heating cabinets, continuous-conveyor ovens, and ring heaters. To ensure reliable results, the tubing size, shrink ratio, wall thickness, component diameter, and temperature control must be coordinated.
Why We Are Chosen as a Partner for Heat-Shrink Tubing Solutions
Since 1964, we have been developing solutions based on polyolefins and halogen-free materials for a wide range of industries. Our project developers provide support in the following areas:
We consider not only the product, but the entire application system—from geometry to the operating environment.
- Material selection and sizing
- Validation of temperature and process parameters
- Sampling and series production approval
- Integration into existing manufacturing processes
We consider not only the product, but the entire application system—from geometry to the operating environment.
Cutting, Custom Sizes, and Delivery Formats
ROTIMA offers heat-shrink tubing on rolls, by the meter, in special lengths, and as custom-cut pieces. Thin-wall and medium-wall heat-shrink tubing with diameters ranging from 1 mm to 10 cm can be cut to length starting at 3 mm, according to customer specifications.
The minimum cutting tolerance is ±0.25 mm; upon request, measurements can be taken with microscopic precision down to 0.01 mm and supplied with a test report.
The minimum cutting tolerance is ±0.25 mm; upon request, measurements can be taken with microscopic precision down to 0.01 mm and supplied with a test report.
| Performance | Information |
|---|---|
| Cutting | 3 mm or longer |
| Diameter range for cutting to size | 1 mm to 10 cm |
| Minimum cutting tolerance | ±0.25 mm |
| Measurement | Caliper or microscopic measurement down to 0.01 mm |
| Test Report | upon request |
| Forms of Delivery | Rolls, partial quantities, meter-length pieces, custom lengths |
| Additional Services | Unwinding, Rewinding, Winding, Outer Packaging |
Do you have any questions about our product line:
Polyolefin & halogen-free heat-shrink tubing
Polyolefin & halogen-free heat-shrink tubing
Types and Varieties of Polyolefin and Halogen-Free Heat-Shrink Tubing
Thick-walled heat-shrink tubing with internal adhesive, HDT-A
HDT-A is a thick-walled heat-shrink tubing with an internal adhesive. This product is made of radiation-crosslinked polyolefin and is used for insulation, moisture-tight encapsulation of electrical connections, splice insulation, and corrosion protection. The adhesive coating is weather- and ozone-resistant and prevents moisture penetration.
| Parameter | Technical Value |
|---|---|
| Wall | thick-walled |
| Glue | with adhesive on the inside |
| Shrinkage ratio | 4,5:1 |
| Minimum Shrinkage Temperature | 135 °C |
| Continuous operating temperature | −55 °C to +110 °C |
| Tensile strength | 10-13 N/mm² |
| Elongation at break | 300-500 % |
| Change in length | max. −10% |
| Dielectric strength | 11 kV/mm |
| Specific Resistance | 10¹⁴ ohm·cm |
| Flammability | self-extinguishing |
| Halogen lamps | halogen-free |
| Standard Color | black |
| Delivery form | Pieces by the meter, custom lengths |
SFTW Thin-Wall Polyolefin Heat-Shrink Tubing
Thin-walled SFTW heat-shrink tubing is a versatile solution for cable assembly, protection, color-coding, and printed cable identification. It is made of radiation-crosslinked polyolefin and is designed for electrical and electronic applications. Standard colors such as black, white, yellow, orange, red, blue, green, and brown are available, as well as transparent versions. The transparent SFTW-202 is halogen-free.
| Parameter | Technical Value |
|---|---|
| Material | Polyolefin |
| Wall | thin-walled |
| Glue | without internal adhesive |
| Shrinkage ratio | 2:1 |
| Minimum Shrinkage Temperature | 135 °C |
| Continuous operating temperature | −55 °C to +135 °C |
| Tensile strength | 14-24 N/mm² |
| Elongation at break | 400-450 % |
| Change in length | max. −5% |
| Dielectric strength | 21-45 kV/mm |
| Specific Resistance | 10¹⁴ ohm·cm |
| Flammability | self-extinguishing |
Thin-walled heat-shrink tubing with internal adhesive: ETW-803 and ETW-804
Thin-walled heat-shrink tubing with an internal adhesive is used when sealing, moisture protection, or corrosion protection is required in addition to electrical insulation. ROTIMA offers ETW variants with 3:1 and 4:1 ratios. Both variants are self-extinguishing and have a dielectric strength of 18 kV/mm.
| Parameter | Value |
|---|---|
| Material | Polyolefin |
| Wall | thin-walled |
| Glue | thermoplastic interior adhesive |
| Shrinkage ratio | 3:1 or 4:1 |
| Function | Sealing, Protection, Encapsulation |
| Properties | radiation-cured, cold-flow-free |
| Areas of application | Cable Connections, Adapters |
| Forms of Delivery | Rolls, meter-length pieces |
| Variants | ETW-803, ETW-804 |
| Application | Moisture Protection |
Halogen-free, thin-walled heat-shrink tubing GTI 3000
GTI 3000 is a halogen-free, thin-walled polyolefin heat-shrink tubing without a hot-melt adhesive. It is primarily used for electrical insulation and marking of connections on cables and wires. The surface is smooth and glossy. Important: According to ROTIMA data, this variant is not self-extinguishing.
| Parameter | Technical Value |
|---|---|
| Material | Polyolefin |
| Wall | thin-walled |
| Glue | without internal adhesive |
| Shrinkage ratio | 3:1 |
| Continuous operating temperature | −55 °C to +135 °C |
| Minimum Shrinkage Temperature | 120 °C |
| Tensile strength | 18 N/mm² |
| Elongation at break | 400 % |
| Longitudinal shrinkage | max. −5% |
| Dielectric strength | 350 kV/cm |
| Halogen | halogen-free |
| Self-extinguishing | not self-extinguishing |
| Standard Color | black |
| Delivery form | Pieces by the meter, special lengths ＜ 1 m |
Transparent, thin-walled heat-shrink tubing with internal adhesive: SPS-300 and SPS-400
Transparent, thin-walled SPS heat-shrink tubing is made of flexible polyolefin with an adhesive thermoplastic inner layer. ROTIMA recommends them for watertight seals in electrical applications, such as automotive and marine wiring harnesses, cable connections, cable exits, and transition points between connectors and cables.
| Parameter | Description |
|---|---|
| Product Family | SPS-300 / SPS-400 |
| Material | flexible polyolefin |
| Wall | thin-walled |
| Glue | thermoplastic inner adhesive layer |
| Color | transparent |
| Function | Finishing, Protection, Bonding, Sealing |
| Areas of application | Wiring harnesses, cable connections, transition points |
| Delivery form | Original rolls, partial quantities, 1.22-meter lengths, custom lengths |
Do you have any questions about our product line:
Polyolefin & halogen-free heat-shrink tubing
Polyolefin & halogen-free heat-shrink tubing
Polyolefin & Halogen-Free Heat-Shrink Tubing:
Technical Specifications and Solutions by Industry
We specifically use polyolefin- and halogen-free heat-shrink tubing when electrical insulation, mechanical protection, and consistent processing must be combined. The key factors here are the material’s controlled thermal recovery and its adaptation to the specific operating environment.
Since 1964, we have been developing heat-shrink tubing solutions for industrial applications and supporting our customers in designing solutions tailored to the specific material and application.
Halogen-free variants are used in particular where the formation of corrosive and toxic gases must be reduced in the event of a fire. These materials meet requirements for smoke density and emission behavior without losing the fundamental properties of polyolefin.
Since 1964, we have been developing heat-shrink tubing solutions for industrial applications and supporting our customers in designing solutions tailored to the specific material and application.
Halogen-free variants are used in particular where the formation of corrosive and toxic gases must be reduced in the event of a fire. These materials meet requirements for smoke density and emission behavior without losing the fundamental properties of polyolefin.
Halogen-free heat-shrink tubing for data centers and building systems
In infrastructure projects, the focus is on fire protection and system availability. We use halogen-free heat-shrink tubing when low smoke emission and reduced corrosiveness are required.
| Parameters | Specifications |
|---|---|
| Material | halogen-free polyolefin (LSZH) |
| Shrinkage ratio | 2:1 to 3:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +200 °C |
| Flame behavior | self-extinguishing (depending on the type) |
| Smoke development | reduced |
| Corrosiveness | low |
| Mechanical Properties | moderate to high |
| Use | Control Panel Construction, Building Wiring |
| Special feature | No halogen-containing gases in the event of a fire |
Polyolefin and halogen-free heat-shrink tubing for the automotive and rail industries
In mobile applications, vibration resistance, temperature resistance, and chemical resistance are key considerations. Our specialists select radiation-cured polyolefin heat-shrink tubing for these applications, which is characterized by stable mechanical properties and predictable shrinkage behavior.
| Parameters | Specifications |
|---|---|
| Material | radiation-crosslinked polyolefin |
| Variant | halogen-free (optional) |
| Shrinkage ratio | 2:1 to 4:1 |
| Operating temperature | approx. −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +200 °C |
| Mechanical Properties | vibration- and abrasion-resistant |
| Chemical resistance | Resistant to oil, fuels, and cleaning agents (depending on the type) |
| Flexibility | flexible, depending on wall thickness |
| Waterproofing | Optional with adhesive backing |
| Use | Cable Protection, Transitions, Labeling |
Heat-Shrink Tubing for Aviation, Electronics, and Plant Engineering
For highly specialized applications, we select variants with defined tolerances, low weight, and stable electrical properties.
| Parameters | Specifications |
|---|---|
| Material | specially cross-linked polyolefin |
| Shrinkage ratio | 2:1 to 3:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +180 °C |
| Wall thickness | thin-walled |
| Flexibility | Very high |
| Precision | high |
| Chemical resistance | Fuels, Oils (depending on the model) |
| Use | Electronics, Control Systems |
| Special feature | lightweight |
Heat-Shrink Tubing for Mechanical Engineering and Power Supply
For industrial systems and energy applications, we select heat-shrink tubing based on mechanical stress, environmental factors, and insulation requirements.
| Parameters | Specifications |
|---|---|
| Material | Polyolefin, medium- to thick-walled |
| Shrinkage ratio | 3:1 to 4:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +200 °C |
| Mechanical Strength | high |
| Abrasion resistance | high |
| Chemical resistance | Oil, hydraulic fluids (depending on the model) |
| Waterproofing | Possible with internal adhesive |
| Use | Cable Connections, Adapters |
| Application | Mechanical Engineering, Power Generation Systems |
Polyolefin heat-shrink tubing for medical technology and household appliances
In sensitive applications, the focus is on a uniform surface, flexibility, and controlled processing. Our engineers select thin-walled variants with precise tolerances for these applications.
| Parameters | Specifications |
|---|---|
| Material | Polyolefin (halogen-free options available) |
| Shrinkage ratio | 2:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +180 °C |
| Wall thickness | thin-walled |
| Flexibility | Very high |
| Surface | smooth |
| Chemical resistance | resistant to cleaning and disinfecting agents |
| Use | Device Cabling, Sensors |
| Special feature | precise workmanship |
Heat-Shrink Tubing for Marine and Offshore Applications
In marine applications, corrosion protection, UV resistance, and mechanical strength are key considerations. For this purpose, we use thick-walled versions with an internal adhesive.
| Parameters | Specifications |
|---|---|
| Material | Polyolefin |
| Shrinkage ratio | 3:1 to 4:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C to +200 °C |
| Consistency | Saltwater- and UV-resistant (depending on the model) |
| Abrasion resistance | high |
| Waterproofing | with adhesive on the inside |
| Protective function | mechanically sealed and moisture-proof |
| Use | Outdoor Cabling |
| Application | Shipbuilding, Offshore |
Heat-Shrink Tubing for Underground and Infrastructure Projects
In tunnel and infrastructure projects, the focus is on fire protection, mechanical robustness, and long-term stability.
| Parameters | Specifications |
|---|---|
| Material | Polyolefin; halogen-free options available |
| Shrinkage ratio | 3:1 to 4:1 |
| Operating temperature | −55 °C to +135 °C |
| Shrinkage temperature | approx. +120 °C |
| Abrasion resistance | high |
| Chemical resistance | Soil Moisture, Environmental Media |
| Waterproofing | with adhesive on the inside |
| Protective function | mechanical and electrical |
| Use | Cable Protection |
| Application | Tunnels, Infrastructure |
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Oliver Bürli
Head of Hose Technology, Sales and Product Management
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Polyolefin and Halogen-Free Heat-Shrink Tubing
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