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Premium Heat Shrink Tubing & Electrical Insulation Solutions

Shanghai Lontom Electric Material Co., Ltd. – ISO-certified manufacturer since 2010, delivering high-performance expandable sleeving, insulation tapes, and protective materials for automotive, industrial, energy, and railway applications.

Lontom Tech Product Display

15+

Years Experience

2010

Founded

Global

Shipping

UL

Certified

ISO

Compliant

Lontom Tech Facility

About Lontom

Founded in 2010, Shanghai Lontom Electric Material Co., Ltd. is a leading manufacturer and supplier of high-quality heat shrink tubing, expandable sleeving, electrical insulation materials, and specialty protection solutions.

We specialize in providing reliable, UL-rated materials for wire harness and cable protection across automotive, industrial, energy, and railway sectors. Our commitment to excellence ensures every product meets or exceeds customer expectations.

  • ISO-Certified Manufacturing
  • UL-Rated Materials
  • High-Temperature Resistance
  • Fire Protection & Mechanical Durability
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Our Product Range

Engineered for performance, durability, and safety in demanding environments.

Heat Shrink Tubing

Heat Shrink Tubing

Flexible, flame-retardant tubing for wire insulation and protection. Available in multiple diameters and shrink ratios.

  • Shrink Ratio: 2:1, 3:1, 4:1
  • Materials: PE, PVC, PTFE
  • Temp Range: -55°C to 135°C
  • UL Recognized
Expandable PET Sleeving

Expandable PET Sleeving

Braided sleeving for cable bundling and abrasion resistance. Easy to install and expandable for complex harnesses.

  • Material: Polyethylene Terephthalate (PET)
  • Flame Retardant: UL VW-1
  • Diameter: 3mm to 50mm
  • Color: Black, Red, Blue, Yellow
Electrical Insulation Tape

Electrical Insulation Tape

High dielectric strength tape for splicing and insulating electrical connections.

  • Material: PVC, Rubber, Mica
  • Voltage Rating: Up to 600V
  • Temperature: -20°C to 80°C
  • Self-Amalgamating Options
Fiberglass Sleeving

Fiberglass Sleeving

High-temperature protection for wires and cables in extreme environments.

  • Max Temp: 500°C (932°F)
  • Non-Flammable & Chemically Resistant
  • Reinforced & Silicone Coated Options
  • Used in Motors, Generators, Ovens
Dual Wall Adhesive Tubing

Dual Wall Adhesive Tubing

Waterproof and corrosion-resistant with inner adhesive layer for sealed protection.

  • Shrink Ratio: 3:1
  • Adhesive Melts at 120°C
  • IP68 Waterproof Rating
  • Marine & Automotive Grade
High-Temp Insulation Sleeving

High-Temp Insulation Sleeving

PTFE and silicone-coated sleeving for aerospace, industrial heating, and engine applications.

  • Temp Range: -65°C to 260°C
  • Excellent Dielectric Properties
  • Flexible & Cut Resistant
  • Meets MIL-SPEC Standards
Insulating Bushings

Insulating Bushings

Protect wires passing through metal panels. Prevent abrasion and short circuits.

  • Materials: Nylon, Rubber, PVC
  • Flame Retardant: UL 94V-0
  • Multiple Sizes & Flange Types
  • Automotive & Industrial Use
Bimetallic Switch Covers

Bimetallic Switch Covers

Insulated covers for thermal switches and sensors in heating systems.

  • Heat-Resistant Materials
  • Electrical Isolation
  • Custom Molding Available
  • Used in HVAC & Appliances

Industry Applications

Our materials are trusted across critical industries for reliability and performance.

Automotive

Wiring harness bushings, engine sensors, fuel and brake line protection. Resistant to oil, heat, and vibration.

Industrial & Energy

Electric motors, generators, wind turbines, home appliances. UL-rated for internal insulation and safety.

Railway

High-temperature resistance, fire protection, and mechanical durability for signaling and power systems.

Quality & Support

Lontom achieves excellence by consistently delivering an exceptional level of quality to its customers. We provide personalized and professional service for OEMs, distributors, and engineering teams worldwide.

  • ISO 9001:2015 Certified
  • UL Recognized Components
  • RoHS & REACH Compliant
  • Custom Solutions & Private Labeling
  • Technical Data Sheets & Sample Kits
View Certificates
Lontom Certifications

Frequently Asked Questions

What is the shrink ratio of your heat shrink tubing?

We offer 2:1, 3:1, and 4:1 shrink ratios depending on the material and application. Commonly used is 2:1 for general insulation.

Are your products UL certified?

Yes, many of our heat shrink tubing, tapes, and sleeving products are UL recognized. Please check individual product specifications.

Can I get custom sizes or colors?

Yes, we support OEM customization including size, color, printing, and packaging. Contact us for details.

What is the temperature range for fiberglass sleeving?

Our standard fiberglass sleeving withstands up to 500°C (932°F). Silicone-coated versions offer additional moisture resistance.

Do you offer samples?

Yes, we provide free samples for qualified customers. Please contact our sales team with your requirements.

Contact Lontom Tech

For inquiries, samples, or technical support, reach out to our team. We respond within 24 hours.

Contact Information

Phone: +86-13818052015

Office: +86-21-63147475

Fax: +86-21-64285332

Email: ellenjie@lontom-elec.com

Alt Email: ellenjie@lontomtech.com

Contact Person: Ellen Jie

Address: Room 516, Building A, No.1500 Longwu Road, Shanghai 200231, China

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