Flexible, Heat-Shrink and Sleeving for Busbar, Cable and Sensor Insulation

Polyimide, Mylar, PTFE, silicone-coated fiberglass and polyolefin shrink sleeving for 800V EV, ESS and power cable.

💾 Product Catalog

Download the PDF datasheet for this product family.

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Products in this family

Heat-Shrink Busbar Sleeve

Recovers to a tight fit on busbars with V-0 flame and rated voltage wall.

800V Busbar Heat-Shrink Tubing

Rated wall and recovery for 800V EV and energy-storage busbars.

ESS Busbar Insulation Sleeve

Insulation for battery racks and ESS busbar links.

Power Cable Heat-Shrink Tubing

Joint and termination sleeve rated across LV and MV cable voltages.

Heat-Shrink Power Cable Accessories

Molded accessories and kits for cable joints and terminations.

Double-Wall Heat-Shrink Tube

Inner adhesive layer seals out moisture on cable and harness joints.

PVC Heat-Shrink Sleeving

Low-cost shrink sleeving for color coding and light insulation.

Teflon Heat-Shrink Tubing

Shrink PTFE for chemically aggressive and high-temperature service.

PTFE Tubes

Pure and filled PTFE tube for fluid, electrical and semiconductor duty.

PTFE Tubing for Medical Devices

Medical-grade PTFE liners and shafts with tight ID control.

Teflon Tube for Automotive High-Temp Cable

PTFE sleeving for engine-bay and powertrain wiring.

Polyimide Capillary Tube for Sensors

Thin-wall polyimide capillary for thermocouple and RTD protection.

Mylar Shrink Tubing

Polyester shrink tubing for phase insulation and wrap.

Mylar Sleeve for Flange Bolt Insulation

Bolt sleeves that break the galvanic path at flanged joints.

Acrylic Fiberglass Sleeving

Braid-and-coat sleeving for flexible electrical insulation.

Silicone-Coated Fiberglass Sleeving

Higher-temperature flexible sleeving for harness and components.

Silicone Resin Fiberglass Sleeve

Resin-impregnated glass sleeve with a sealed, smooth wall.

Silicone-Coated Fire Sleeve

High-temperature fire sleeve for hydraulic lines and harnesses.

Busbar Conjunction Box Series

Insulated boxes and covers for busbar joints and taps.

Technical resources

Common questions

Which shrink ratio do I need for a busbar sleeve?

Shrink ratio (2:1, 3:1, 4:1) sets how much larger the supplied ID is than the recovered ID. Pick the ratio from your busbar cross-section plus any corner buildup, then confirm recovered wall and voltage rating with us.

What temperature can PTFE sleeving take?

PTFE service is broadly -200 to +260 °C with near-universal chemical resistance. For continuous flex or tighter bend radius, FEP or PFA may be a better choice — we will advise from the duty.

What tolerances can you hold on PTFE tubing?

ID/OD ±0.05 mm on standard sizes; tighter tolerances available with grinding. PTFE is sized by sintering, so critical dimensions are best held by finish grinding after forming.

Can PTFE be threaded or machined?

PTFE can be CNC-turned for ends, slots and holes using sharp, low-speed tools to avoid chatter. Threads are best formed by machining rather than rolling.

Do you supply material certification for PTFE?

Yes. Each batch includes a material COA. First-article inspection and dielectric strength testing are available per your specification.

Quote Flexible, Heat-Shrink and Sleeving for Busbar, Cable and Sensor Insulation from WELLELE

Send the drawing with your requirements — material grade, dimensions, tolerance and annual quantity. We match the grade and respond with manufacturability notes and quotation.

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