PRODUCT OVERVIEW
Our fluoropolymer (FKM / Viton-style) adhesive-lined heat shrink tubing is a high-performance dual-wall solution engineered for the most demanding high-temperature, chemically aggressive environments where standard polyolefin tubing cannot survive. Featuring a fluoroelastomer outer jacket and a high-temperature hot-melt adhesive inner liner, this tubing delivers exceptional resistance to jet fuels, hydraulic fluids, lubricating oils, solvents, and broad chemical exposure — all while maintaining reliable performance at continuous operating temperatures up to 200°C.
With a 2:1 shrink ratio, the tubing recovers uniformly under heat while the inner adhesive melts and flows, creating a hermetic, chemically resistant seal that bonds to both the tubing and the underlying substrate. This combination makes it the material of choice for aerospace wiring, military equipment, engine compartment harnesses, and industrial applications involving fuels, oils, and extreme thermal cycling.
Important Note: The flammability rating applies specifically to the outer fluoropolymer wall. The inner hot-melt adhesive layer is formulated for high-temperature sealing performance and is not independently flame-certified. Verify suitability for your specific application requirements.
KEY TECHNICAL SPECIFICATIONS
• Shrink Ratio: 2:1 (recovers to 1/2 of original diameter)
• Wall Construction: Dual-wall structure
- Outer Wall: Cross-linked fluoroelastomer (FKM / fluororubber)
- Inner Liner: High-temperature resistant hot-melt adhesive
• Operating Temperature Range: -65°C to +200°C (continuous)
• Short-Term Peak Temperature: Up to 230°C (intermittent)
• Shrink Initiation Temperature: ≥ 120°C
• Full Recovery Temperature: 175°C
• Dielectric Strength: ≥ 15 kV/mm
• Volume Resistivity: ≥ 1×10¹³ Ω·cm
• Tensile Strength: ≥ 8 MPa
• Elongation at Break: ≥ 150%
• Fluid Resistance (200°C / 70h immersion):
- Jet Fuel (JP-4 / JP-8): Volume change < 10%
- Hydraulic Fluid (Skydrol / MIL-H-5606): Volume change < 15%
- Engine Oil (10W-40): Volume change < 10%
- Diesel / Gasoline: Excellent resistance
• Low-Temperature Flexibility: Remains flexible down to -65°C without cracking
• Ozone & Weathering Resistance: Excellent
• Certifications: RoHS 3.0, REACH SVHC Compliant; meets typical aerospace material performance requirements
PERFORMANCE ADVANTAGES
► Extreme High-Temperature Capability
Rated for continuous operation at 200°C with intermittent exposure to 230°C — far exceeding the 125°C limit of standard polyolefin heat shrink tubing. The fluoropolymer outer wall maintains mechanical integrity, dielectric performance, and dimensional stability even under prolonged high-heat exposure and severe thermal cycling.
► Unmatched Chemical & Fluid Resistance
The FKM fluororubber compound provides outstanding resistance to a broad spectrum of aggressive fluids including jet fuels (JP-4, JP-8), aviation hydraulic fluids (Skydrol, MIL-H-5606), engine oils, diesel, gasoline, solvents, and many industrial chemicals. Volume swell remains well within specification limits even after extended immersion at elevated temperatures.
► Hermetic High-Temperature Sealing
The dual-wall construction with high-temperature adhesive liner creates a bonded, moisture-proof seal that remains intact across the full operating temperature range. Unlike standard EVA adhesives that soften at elevated temperatures, the high-performance inner adhesive maintains bond strength and sealing integrity at 200°C continuous service.
► Superior Ozone & Weathering Resistance
Fluoropolymer materials are inherently resistant to ozone, UV radiation, oxygen aging, and outdoor weathering — making this tubing ideal for long-term exterior and under-hood applications where environmental degradation is a concern.
► Low-Temperature Flexibility
Despite its high-temperature rating, the material remains flexible at temperatures as low as -65°C, resisting cracking and brittleness in cold environments and maintaining seal integrity through extreme temperature cycles.
► Aerospace-Grade Durability
Engineered to meet the rigorous demands of aerospace and military applications, this tubing withstands vibration, mechanical flexing, and fluid exposure in the most severe service environments — from engine nacelles to landing gear wiring.
TYPICAL APPLICATIONS
✈️ Aerospace & Aviation
• Engine compartment and nacelle wiring harnesses
• Fuel system sensor and connector sealing
• Hydraulic line electrical connections
• Avionics cable splices in high-temperature zones
• Landing gear and auxiliary power unit (APU) wiring
🛡️ Military & Defense
• Military vehicle engine bay wiring
• Weapon system cable sealing and insulation
• Naval shipboard fuel system connections
• Missile and ordnance wiring protection
🚗 Automotive Performance & Racing
• High-performance race car engine bay harnesses
• Turbocharger and exhaust sensor wiring
• Fuel injector and fuel pump connections
• Aftermarket high-temperature electrical upgrades
🏭 Industrial & Petrochemical
• Refinery and chemical plant instrumentation wiring
• High-temperature sensor and probe cable sealing
• Furnace and oven equipment wiring
• Oil and gas downhole connectors (temperature-rated)
🔥 High-Temperature Manufacturing
• Plastic injection molding machine wiring
• Oven and kiln sensor cables
• Foundry and metal processing equipment connections
⚓ Marine & Offshore (High-Temp Zones)
• Engine room wiring and fuel system connections
• Exhaust gas sensor cables
• Offshore platform high-temperature instrumentation
INSTALLATION INSTRUCTIONS
Required Tools: High-output heat gun (minimum 450°C output), heat-resistant gloves, utility knife or tubing cutter, optional: reflector nozzle
Step 1 — Preparation
Cut tubing to the required length using a sharp blade. Allow a minimum overlap of 20 mm on each side of the splice or connector. Note: Fluoropolymer tubing requires higher heat input for full recovery than standard polyolefin products.
Step 2 — Placement
Slide the tubing over the cable and position it centrally over the splice, joint, or termination point.
Step 3 — Heat Application
Apply heat using a high-output heat gun set to 450–500°C. Begin at the center and work progressively toward each end. Maintain consistent, even heat distribution. Fluoropolymer tubing requires longer heat exposure due to its higher recovery temperature (175°C). Keep the heat source moving continuously to avoid localized overheating or surface scorching.
Step 4 — Verification
Continue heating until the tubing has fully conformed to the underlying profile and a continuous bead of adhesive extrudes from both ends, confirming complete flow and circumferential sealing. The recovered surface should be smooth with no wrinkles, bridging, or evidence of under-recovery.
Step 5 — Cooling & Inspection
Allow the assembly to cool naturally at room temperature. Do not quench with water or forced cooling as this may create internal stress or adhesive voids. Once cooled, inspect for full recovery, uniform adhesive coverage, and surface integrity.
Important: Due to the high recovery temperature of fluoropolymer tubing, ensure that adjacent components and substrates can withstand installation temperatures of up to 200°C without damage. Use heat shields when installing near temperature-sensitive parts.
QUALITY ASSURANCE & COMPLIANCE
• Manufactured under ISO 9001:2015 certified quality management systems
• Each production lot undergoes dimensional verification, shrink ratio testing, and fluid resistance validation
• Material traceability and lot-specific test data available upon request
• Custom sizes, colors, and specialized formulations available for volume orders (MOQ applies)
• Full material data sheet (TDS/MSDS) available for qualified customers
PACKAGING OPTIONS
• Standard Spools: 15m / 30m continuous lengths
• Cut Pieces: Pre-cut segments in standard or custom lengths
• Custom Packaging: Labeled and packaged per customer specification for OEM / production use
• Private Label: Available for industrial distribution partners with qualifying volume
