By What does an exothermic welding kit cost in India?
There is no single “exothermic welding kit price” because a kit is really two priced items — a reusable graphite mould and a consumable weld powder charge — and both are sized to your specific connection. That is why marketplace listings show such a wide band (commonly a few thousand rupees for a small cable-to-rod mould, more for larger or multi-conductor moulds), while the powder is priced per shot by weight. The honest way to price a job is by the connection type and conductor size, not by a headline figure. This guide explains what sets the price, what a kit contains, the common sizes, and how to choose — so you can ask for an accurate quote the first time.
What’s inside an exothermic welding kit
- Graphite mould — machined for one connection geometry (cable-to-cable, cable-to-rod, cable-to-tape/plate, tee, cross) and one conductor size. Reusable for many welds, so it is a one-time cost per configuration.
- Weld powder + igniter — the copper-oxide/aluminium charge, sized to the mould (e.g. 32g, 45g, 65g, 90g, 115g, 150g and up). Consumed one shot per joint, so this is your running cost.
- Handling accessories — mould handle/clamp, cleaning brush, flint igniter and slag scraper.
Because the mould is reusable and the powder is per-shot, the real cost of a project is mould (once) + powder × number of joints. For a big earthing grid with dozens of identical joints, the mould cost is spread thin and the powder dominates.
Get a configuration-specific quote → Ashlok Exothermic Welding Kit
What drives the price
- Connection type — a simple cable-to-rod mould is cheaper than a cross or multi-cable mould.
- Conductor size — bigger conductors need a bigger mould cavity and a larger powder charge.
- Weld powder weight — priced by grams per shot; larger joints use more.
- Quantity — mould cost amortises across many welds; buying powder in bulk lowers the per-joint cost.
- Kit completeness — whether you need the full accessory set or just refills of powder for an existing mould.
Common mould and powder sizes
Powder charges are quoted by weight and matched to the mould and conductor. As a rough map: small charges (about 32–65g) suit light cable-to-rod and earthing-strip joints; medium charges (about 90–150g) suit heavier grid conductors and cable-to-plate work; larger charges are used for big busbar and multi-conductor connections. Always match the charge to the mould — an undersized shot gives a porous, high-resistance weld, and an oversized one wastes powder and can damage the mould. If you are unsure, share your conductor sizes and connection type and let the supplier specify the mould and charge for you.
Exothermic weld vs mechanical clamp — is the price worth it?
A clamp is cheaper up front, but it relies on contact pressure that relaxes and surfaces that corrode, so resistance climbs and the joint can fail under fault current. An exothermic weld fuses the conductors into one piece with full current-carrying capacity, no corrosion at the joint, and zero maintenance for the life of the installation. For a permanent earthing grid or a lightning-protection down-conductor termination, the small extra cost per joint buys a connection you never have to revisit. For temporary or frequently accessed points, a clamp is fine. If you want the full method, see our exothermic welding kit guide.
How to choose the right kit
- List every connection you need to make (cable-to-rod, cable-to-cable, etc.) and the conductor sizes.
- Pick a mould per unique geometry + size; count how many joints of each you have.
- Match the weld-powder charge to each mould.
- Add the accessory set if you do not already own one.
- Order a little spare powder — misfires and re-welds happen on site.
Pair your exothermic connections with the right electrodes: see Ashlok’s copper bonded earthing rods, and if you are new to earthing start with our earthing electrode guide.
Frequently asked questions
How is exothermic welding kit price calculated?
By the mould (a one-time cost per connection type and conductor size) plus the weld powder (a per-shot cost by weight). Your project cost is the mould once, plus powder multiplied by the number of joints.
Is the graphite mould reusable?
Yes. A graphite mould lasts many welds — often 50 or more with care. You only replace the weld powder for each joint, which is why exothermic welding is economical at scale.
What weld powder size do I need?
It depends on the conductor size and connection type. Small charges suit light cable-to-rod joints; medium and large charges suit heavier grid and busbar conductors. Share your conductor sizes and we will specify the correct charge.
Can one kit make different connection types?
Each mould is machined for one geometry and size, so mixed connections need more than one mould. The powder and accessories, however, are shared across compatible moulds.
Is exothermic welding approved for earthing and lightning protection?
Yes. It is the standard method for permanent, low-resistance connections in earthing grids and lightning-protection terminations, and is widely specified for substations, plants and infrastructure.
Ashlok has manufactured earthing and lightning-protection products, including exothermic welding kits, since 1999. Get an exothermic welding kit quote →