Cadweld Installers

Cadweld Exothermic Welding

> Exothermic Welding Services

Cadweld or Exothermic welding (also known as exothermic bonding or thermite welding) is a welding process for joining two electrical conductors, that employs molten metal to permanently join the conductors.

The process employs an exothermic reaction of a thermite composition to heat the metal, and requires no external source of heat or current. The chemical reaction that produces the heat is an aluminothermic reaction between aluminium powder and a metal oxide.

Cadweld North Wales

The Advantages of Cadweld

An exothermic weld has higher mechanical strength than other forms of weld, and excellent corrosion resistance. It is also highly stable when subject to repeated short-circuit pulses, and does not suffer from increased electrical resistance over the lifetime of the installation. Since it’s development in 1938, CADWELD electrical connections have become recognised as the ultimate connection for rail, cathodic, power and grounding applications.

CADWELD© offers a superior properties over normal welding and bonding:

  • Cadweld withstands repeated fault currents without failing during operation.
  • It exceeds requirements of IEEE Std 837- Std. for Qualifying Permanent Connections Used In Substation Grounding.
  • Joins copper to copper, copper to galvanized or plain steel, copper to copper clad steel, copper to bronze/ brass/stainless steel, steel to steel, etc.
  • The current carrying capacity is equal to that of the conductor.
  • Cadweld provides a permanent, molecular bond that will not loosen or corrode, resulting in a connection with a lifetime equal to that of the installation.
  • No external power or heat source is required.
  • Quality Assurance Inspection is easy and visual.

To discuss any CADWELD© exothermic welding requirement or for a FREE, no obligation quotation please feel free to contact us »

Cadweld Installers North Wales
PF&S Anglesey Electricians

Specialist electrical & renewable solutions for domestic & commercial sectors. Contact PF&S Ltd. today.


PF&S Ltd are committed to continual improvement and professional development. And, as one of the area’s most trusted service providers, you can be sure our work is of the highest levels and delivered on time and within budget. As a testament to our strict standards and ethos of providing a quality service to all our customers, we are a member of a number of professional organisations and trade bodies.

Microgeneration Certification Scheme
Plumis Automist sprinklers
NSI Gold Accredited
BAFE Accredited North Wales
Fire Protection Association