| Polyolefin | Approximately −55°C to 135°C | Usually 2:1 or 3:1; higher ratios are available | Flexible to semi-flexible | Good resistance to moisture, abrasion, dilute acids, and many common chemicals; standard grades may have limited resistance to fuels and solvents | Good dielectric strength and insulation performance; widely available in flame-retardant grades | General wire insulation, cable bundling, connector protection, strain relief, and corrosion sealing | Best general-purpose option when balanced cost, flexibility, electrical insulation, and processing are required |
| Cross-Linked Polyolefin | Approximately −55°C to 135°C, depending on formulation | Typically 2:1 to 4:1 | Flexible and mechanically tough | Good resistance to abrasion, moisture, vibration, and many oils; performance depends on the cross-linking system and compound | Strong insulation properties and reliable recovery after heating | Automotive harnesses, industrial wiring, battery cables, and mechanically demanding cable protection | Choose when improved toughness and dimensional recovery are more important than the lowest material cost |
| Elastomeric Polyolefin | Approximately −75°C to 150°C | Usually 2:1 or 3:1 | Very flexible and resilient | Good low-temperature performance, vibration resistance, weathering resistance, and resistance to many fluids | Good insulation properties with improved flexibility compared with rigid plastic systems | Dynamic cable assemblies, low-temperature environments, flexible splices, and vibration-prone equipment | Use where repeated flexing, impact absorption, or cold-weather flexibility is required |
| PVC | Approximately −20°C to 105°C, depending on grade | Typically 2:1 | Flexible; can be softer than polyolefin | Good resistance to water, abrasion, and many diluted chemicals; plasticized grades may be affected by oils, solvents, and heat aging | Good insulation performance; flame-retardant formulations are common | Consumer electronics, low-voltage wire marking, cable identification, and light-duty bundling | Choose for low-cost color coding or marking where operating temperature and chemical exposure are moderate |
| Fluoropolymer: PVDF | Approximately −55°C to 175°C | Usually 2:1 | Semi-rigid to moderately flexible | Excellent resistance to many chemicals, fuels, oils, solvents, abrasion, and ultraviolet exposure | Good dielectric properties and relatively thin, tough insulation | Aerospace, automotive fluid exposure, chemical processing, and high-temperature wire protection | Use when thin walls, high temperature, abrasion resistance, and chemical resistance are needed together |
| Fluoropolymer: PTFE | Approximately −65°C to 260°C | Commonly about 1.7:1; product-specific ratios vary | Low flexibility compared with polyolefin; can be relatively stiff | Exceptional resistance to chemicals, solvents, fuels, and high-temperature environments; very low friction | Excellent dielectric performance over a broad temperature range | High-temperature aerospace, laboratory equipment, chemical processing, and demanding electrical insulation | Choose for extreme temperature and chemical exposure; verify recovery temperature because processing requires more heat |
| Fluoropolymer: FEP | Approximately −55°C to 200°C | Commonly about 1.3:1 to 1.5:1 | Flexible to semi-flexible, with a relatively smooth surface | Excellent chemical resistance, low moisture absorption, and strong resistance to weathering and non-stick contamination | Very good dielectric properties and low surface energy | High-purity tubing, sensor assemblies, chemical handling, and specialized high-temperature insulation | Use when chemical inertness and cleanability are more important than a high shrink ratio |
| Polyvinylidene Fluoride (PVDF) Adhesive-Lined | Approximately −55°C to 150°C, depending on the adhesive system | Typically 2:1 or 3:1 | Moderately flexible with a tough outer layer | Strong resistance to fuels, oils, chemicals, abrasion, and moisture; the adhesive provides additional sealing | Suitable for electrical insulation when the adhesive and voltage rating are specified for the application | Sealed wire transitions, fluid-exposed harnesses, and high-performance cable joints | Confirm adhesive compatibility, wall thickness, recovery temperature, and the maximum continuous temperature of the inner adhesive |
| Elastomeric Rubber | Approximately −75°C to 150°C, depending on rubber chemistry | Typically 2:1 to 4:1 | Highly flexible, elastic, and conformable | Excellent resistance to vibration and low temperatures; oil, fuel, ozone, and chemical resistance varies by formulation | Good insulation performance in suitable grades | Cable splices, flexible boots, dynamic assemblies, and irregularly shaped components | Choose when flexibility, sealing, and strain relief are more important than maximum stiffness or the highest temperature rating |