About Us

In 1979, Therm-O-Link, Inc started manufacturing wire for the automotive industry and over years has grown into a major supplier of insulated copper wire for various global markets. We attribute our success to a great team of experienced employees whose goal is to supply customers with a quality product, on time and at a competitive price.

All of our plants are proudly located within the United States in Garrettsville and Warren, Ohio and El Paso, Texas, where we take 5/16th inch copper rod and draw it down to stranding that is bunched to form a conductor that can be jacketed with XLPE, PVC, Silicone or CPE ranging from 80°C to 200°C. We tin coat our bare copper at our location in Warren, Ohio and have the capability to provide tin overcoat and tin top coated stranding out of our Garrettsville, Ohio plant.

Therm-O-Link, Inc and VULKOR manufactures a wide-range of insulated copper wire for the following industries.

  • Automotive
  • Agriculture
  • Appliance
  • Heavy Truck
  • High Temperature
  • High Voltage
  • Marine
  • Motor Lead Wire
  • Submersible Pumps
  • White Goods Manufacturers

We are a Tier 2 supplier to the transportation industry's leading global automotive, trucking, RV and marine manufacturers. In addition, we are a Tier 2 supplier to top-name appliance manufacturers and Motor Lead Wire Markets.

Please contact our sales department if you would have a wire need and we would appreciate the opportunity to earn your business.

Markets Served


  • Automotive
  • RV™s
  • Marine
  • Bus
  • Military
  • Agriculture
  • Heavy Truck
  • Battery Cable
  • Trailer Cable


  • White Goods
  • Electric Motor
  • Hermetic Motor
  • Lead Wire


  • Switchgear
  • Communication & Power Cable