Is the gallon cheaper than buying aerosol cans?

Yes. At $32.44 for a gallon at The Home Depot as of November 6, 2026, the cost per ounce is well below aerosol cans, which also lose product to propellant.

Can I refill WD-40 spray bottles from the gallon?

Yes. The gallon is the same liquid as the aerosol, so it works in refillable spray bottles and pump sprayers. Pour carefully or use a funnel.

Does WD-40 work as a lubricant?

It lubricates light-duty parts like hinges and squeaks, but it is not a lasting grease. For bearings and high-load parts, use a dedicated lubricant.

Is it safe on electrical parts?

Its dielectric strength is listed at 44,400 to 47,800 volts, so it is used to displace moisture from electrical components. Let it dry and avoid powered circuits.

What temperature range does it handle?

The listed operating range is -10°F to 200°F, with a freeze point of -63°C. It is not suited to high-heat applications.

How much surface does a gallon cover?

Coverage is listed at 600 to 1,000 square feet per gallon, depending on how thin the film is applied.

Where is the WD-40 in 1 Gallon Container cheapest?

At The Home Depot, for $32.44, as of our latest check.

Where can I buy the WD-40 in 1 Gallon Container?

7 stores we checked sell it, including Trumbull Industries, The Home Depot, Amazon, JRM Supplies, eBay.

WD-40 in 1 Gallon Container

Best price now

$32.44at The Home DepotObserved at 9:59 PM

Compared across 6 stores. Prices are checked against each store and labelled with when.

Visit The Home Depot

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Our take on the WD-40 in 1 Gallon Container

WD-40 in a 1-gallon container is the bulk version of the familiar multi-use lubricant: it displaces moisture, penetrates stuck parts, protects metal from rust and dissolves adhesives and grime. The jug covers roughly 600 to 1,000 square feet per gallon, so it suits refilling spray bottles and shop use rather than a single household fix. At $32.44 at The Home Depot as of November 6, 2026, it is the best new price among the 6 stores listing it.