TerraWeld®
Exothermic Welding System

TerraWeld Exothermic Welding SystemThe TerraWeld® Exothermic Welding System provides the ultimate in permanent molecular bonding. The process of exothermic welding, in which no outside source of heat or power is required, is the universally preferred method of making electrical connections of copper-to-copper or copper-to-steel. Lightning protection and grounding systems require connections that maintain current carrying capacity exceeding that of the conductors used in the system. TerraWeld® connections provide higher fusing capacity than the conductors to which they are bonded. System resistance, impedance, and ampacity relate directly to functionality, safety, and regulatory compliance. TerraWeld® meets these challenges and delivers assurance.

TerraWeld® connections provide performance superior to all existing surface-to-surface mechanical retention connectors. Pressure type connections are susceptible to variation, aging, corrosion, and failure--not TerraWeld®. One click of the starter forges a visually inspectable, uniformly conductive, corrosion resistant, continuous solid metal bonding at the molecular level resulting in the only connection which will not loosen or increase in resistance over the lifetime of the installation.

Exothermic Welding ConnectionAlltec’s hermetically sealed metallized pouch design is unique in the industry. Containing premeasured granular metallic particles with a separate sealed tube of starting powder, the materials are not in contact and may be safely handled, stored, and transported. Users may confidently and comfortably drop a few packages in their pocket before heading to a site, and rely on its capability even after prolonged exposure to the elements. TerraWeld® works when others won’t.

The TerraWeld® Exothermic Welding System uses a light-weight, clamp-on graphite mold to safely position and contain any weld required. The exothermic reaction creates an intense miniature furnace with temperatures exceeding 2,500 °F, instantly producing molten metal which flows into the weld cavity, filling any available space. Moments later the mold may be removed in preparation for the next weld.

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Exothermic Welding Models

TerraWeld® Exothermic Welding Models

W-Series for Wire-to-Wire Exothermic Connections
 W-Series for Wire-to-Wire Exothermic Connections
G-Series for Ground Rod-to-Wire Connections
 G-Series for Ground Rod-to-Wire Exothermic Connections
S-Series for Steel Sheets and Pipe Exothermic Connections
 S-Series for Steel Sheets and Pipe Exothermic Connections
B-Series for Bus Bar Exothermic Connections B-Series for Bus Bar, Grounding Bar, Exothermic Connections
Click image to download the series' specifications


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Exothermic Welding Tools & Accessories

TerraWeld Exothermic Welding Tools & Accessories

  • Weld Metal (Types A, B, C, & CP)

All TerraWeld® weld metals are meticulously packaged in individual moisture proof state of the art foil packs. The starting material is in a separate container within each foil pack; this eliminates weld metal loss due to spoilage and no-start situations. The waterproof foil packs increase shelf life and make for easier transportation. Each box of TerraWeld® contains either 10 or 20 foil packs depending on the size of the weld metal.

  • Weld Molds

Precision engineered for optimum results. Each weld mold is designed to give precise and reliable results. Only the finest materials are utilized so that these molds can withstand continuous heat-cooling cycles.

  • Mold Handle Clamps (CL-2, CL-3, CL-4, CLR-1 and ML-3)
  • Slag Removal Tools
  • Ground Rod Splice Clamp
  • Mold Handle Clamps
  • Mold Sealer
  • Wrap Shims
  • Flame Resistant Blanket
  • Flint Ignitor
  • Ratcheting Cable Cutter
  • Trigger Start Torch Head
  • Mold Cleaning Brush
  • Weld Tool Kit

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