Does Bunnings Sell Welding Gas? The Complete Answer for Australian Welders

Short answer: yes — and this answer changed recently. Bunnings has always sold disposable canisters, but the Coregas Trade N Go range brought genuine refillable swap-and-go cylinders into Bunnings: argon and MIG shielding gas, with a refundable deposit instead of annual rental. The old advice ("Bunnings = disposables only, go elsewhere for real gas") is now out of date. Here's the full 2026 picture, including when Trade N Go is actually a good deal.

What Bunnings actually stocks

Bunnings sells three types of gas-related welding products:

What Bunnings still does NOT sell:

• G-size cylinders (the big high-volume bottles)
• Traditional cylinder rental accounts (Trade N Go replaces rental with a deposit)
• Regulators beyond the Trade N Go range — check your torch fitting first

Why this matters

The September 2026 correction: an earlier version of this guide said Bunnings did not sell refillable welding gas. That was true when written, and it is no longer — our verification crucible caught the change. Bunnings Trade now states it "provides Oxygen, Acetylene, Argon and MIG Shielding gases" through the Coregas Trade N Go program. The disposable canisters remain on sale, and they still work out at roughly $2–$4 per litre of gas versus $0.02–$0.03 per litre from cylinder supply — 100× more expensive. The Trade N Go swap system is the middle path: deposit once, swap empties for full ones, no annual hire fees. If you're not yet sure which gas your machine should be running at all, start with what gas do I need for MIG welding? — the answer decides whether the argon or the MIG-mix bottle is the one you want.

Where to actually get welding gas in Australia

D-size cylinders hold about 1,700–2,000 litres of free gas (argon mix), which gives you roughly two hours of arc time. At a typical MIG flow of 14 L/min, that's several weekends of hobby welding.

Some welding supply stores (Total Tools, Sydney Tools, TradeTools) offer gas cylinder swap services. You buy the cylinder once ($250–$350) and swap it for a full one at $80–$110 per swap. No annual hire fees.

If the reason you're asking about Bunnings gas is convenience, consider gasless flux-core wire instead. It works in any MIG welder that supports it, requires no gas bottle, handles wind and dirty steel, and is what most Australian welding forums recommend for beginners.

Our forum wisdom analysis found that experienced welders consistently recommend gasless flux-core as the starting point for beginners, specifically because it eliminates the gas bottle logistics entirely. The gasless machines Bunnings sells alongside the wire are rated in our Bunnings welder review.

The cost comparison that matters

Frequently asked questions

Can I use Bunnings gas canisters with my MIG welder?

Only if your welder has a specific adapter for disposable canisters. Most standard MIG welders use a CGA-580 fitting designed for refillable cylinders. Check your welder's manual before purchasing.

Does Bunnings sell argon gas?

Yes — as of the Coregas Trade N Go range. Bunnings stocks E-size pure argon ($184) and D-size MIG shielding mix ($118 + $200 refundable deposit). For G-size bottles or traditional rental accounts, you still need a dedicated gas supplier. See our fact-check page for the verification and sources.

Is gasless MIG actually any good?

Yes — for the right jobs. Gasless flux-core handles wind, dirty steel, and outdoor work better than gas MIG. The trade-offs are more spatter and slag to manage. Read our full guide on gasless MIG welding for details.

How much does a gas bottle cost in Australia?

A D-size argon mix refill costs $85–$140 depending on the supplier. Annual cylinder hire adds $60–$120. A G-size refill ($150–$200) gives about five times the gas for roughly 1.5× the price. The hire-vs-swap-vs-buy maths by how often you weld is in our guide to welding gas cost in Australia; observed per-supplier prices by bottle are on welding gas bottle sizes and prices.

Our recommendation

If you're starting out: buy gasless flux-core wire from Bunnings and skip the gas question entirely. When you're welding regularly enough to justify gas, compare a Trade N Go swap at Bunnings against a Supagas or Coregas D-size arrangement — the cost per litre drops from dollars to cents either way, and which one wins depends on how many refills a year you'll do.

And if someone tells you Bunnings does NOT sell welding gas, they're working from pre-Trade N Go advice. It does — D-size MIG mix and E-size argon on a swap-and-go deposit. What it still doesn't sell is the G-size bottle or the rental account a daily welder needs.

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*Gas pricing verified against Australian supplier listings, August–September 2026. Trade N Go pricing observed from Bunnings product listings, September 2026. Cylinder volumes per BOC specifications. Use our gas flow calculator to estimate cylinder life for your welding frequency.*