Can you use WD-40 to sharpen a knife?

Author: Richie Marks DDS  |  Last update: Thursday, March 26, 2026

In the sharpening phase, we do not recommend any current WD-40® Brand Products although some may be used later for storage & protection. For sharpening stones the lubrication can come from water or oil.

Can you use WD-40 on a knife blade?

Yes, it's generally okay to use WD-40 on a knife, but it's not the best option for long-term maintenance. WD-40 is a multi-purpose lubricant and can provide some short-term protection against corrosion.

What is the best lubricant for sharpening knives?

The traditional choice for many has been mineral oil, and there's a good reason for that. Mineral oil is light, inexpensive, and won't go rancid like some natural oils. It's also practically odorless and tasteless, which means it won't transfer any unwanted flavors to your food.

What household items can I use to sharpen a knife?

Using a coffee cup to sharpen your kitchen knife might seem unconventional, but it's actually a quick and effective method. Just make sure to clean the mug thoroughly before using it for coffee again! The method: The coarse bottom of a ceramic coffee mug is abrasive enough to create a makeshift knife sharpening stone.

Can WD-40 be used as honing oil?

The purpose of an oil on an oilstone is to lubricate and carry away the waste from sharpening. WD-40 does neither of those well. 3in1 oil or mineral oil is a better bet. Most honing oils I've seen seem to be just mineral oil.

Sharpen Your Knife Like a Razor With WD-40 In Just 1 Minutes

What can I use if I don't have honing oil?

The term “honing oil” in many cases refers to a petroleum based oil, however it is also used as a generic term to describe the liquid used in the honing process. Some people use Windex, Simple Green, and even water to sharpen that are not oil based.

What is the fastest way to sharpen a dull knife?

Electric knife sharpeners

You can use an electric sharpener, too. The process is much the same, with the added benefit of speed. These products have both honing and sharpening slots. Dragging a knife through the slots accomplishes the same task.

Can I use olive oil to sharpen a knife?

Please Note: Never apply food oils such as vegetable or olive oil to sharpening stones. Only use honing oils approved for sharpening stones.

What two lubricants would you use for sharpening?

If you don't have honing oil plain mineral oil works great. If you're sharpening with a diamond stones you can use water or oil but we strongly recommend using a product called Krud Kutter for lubricating and cleaning diamond sharpening stones. If you're using a waterstone use water.

Can you use olive oil to lubricate a knife?

Don't use cooking oils: It's important to note that you should not use other oils, like olive oil, canola oil, coconut oil, etc., because they will quickly oxidize and go rancid.

Is WD-40 good for steel?

Most people know WD-40 Multi-Use Product as a lubricant, but it was originally used as an anti-corrosive by the aerospace industry to prevent spacecraft from rusting. WD-40 can help remove rust from metals like iron, chrome, and stainless steel without further damaging the surface of the metal or removing the paint.

Is WD-40 good for cutting?

WD-40 Specialist® Cutting Oil provides critical lubrication and protection in metalworking to maximise the life of cutting and drilling equipment, while also improving the overall machined finish.

Does soaking a knife dull the blade?

Don't soak the knives in water as it could damage the blade. If the knife is glued, when soaking for long periods, the blade could detach from the handle. Finally, wood handles should not be left in water; it breaks up the wood's properties.

What should you not do when sharpening a knife?

Don't run your knife through a knife system or device. Running your blade through a device will unevenly chew up the edge, can scratch the face of the blade, and will not get your knife as sharp as using a whetstone to sharpen. Do not belt sharpen knives.

What can I use if I don't have a sharpener?

Slide the Knife Back and Forth: Applying light pressure, slide the knife blade along the rough surface of the mug in a back-and-forth motion. Start from the base of the blade and work your way toward the tip. Repeat this motion several times, evenly sharpening both sides of the knife.

What is the best thing to sharpen a knife with?

Verdict: If you want the edge of your knife blade to be as close to its original angle as possible, use a whetstone. Since it's the gentlest way to sharpen a knife, it extends the durability of knife blade — as long as you use it properly.

How many passes does it take to sharpen a dull knife?

The blade should move smoothly across the stone. Lift the knife, reset the heel at the top of the stone, and repeat. Count each pass made, so you're keeping each side of the knife even and not accidentally taking more material off one side than the other. Repeat as few as ten times and as many as 50.

How to sharpen a knife with household items?

Rough surfaces such as a nail file, sandpaper or an emery board can be used to sharpen a knife, running the blade along the entire length of the file or surface.

What are the two major methods of sharpening a knife?

There are three ways to sharpen a knife yourself:
  • Manual knife sharpener. A manual knife sharpener, also called a “pull through sharpener,” is the cheapest and easiest way to maintain your kitchen knives. ...
  • Electric knife sharpener. ...
  • Whetstone.

Where should you not use WD-40?

7 places to never use WD-40 — you'll be surprised
  • Hinges. (Image credit: Shutterstock) ...
  • Bike chains. (Image credit: Shutterstock) ...
  • Locks. (Image credit: Shutterstock) ...
  • Polycarbonate and clear polystyrene plastic. ...
  • Sensitive electronics. ...
  • Wax polishes and some wax coatings. ...
  • Anything that comes into contact with food.

At what temperature does WD-40 ignite?

Flammability: Yes. Flash point: 47°C (liquid phase) Explosive limits: 0.6-8.2% vol.

Does WD-40 actually lubricate?

Myth: WD-40 Multi-Use Product is not really a lubricant. Fact: While the “W-D” in WD-40 stands for Water Displacement, WD-40 Multi-Use Product is a unique, special blend of lubricants. The product's formulation also contains anti-corrosion agents and ingredients for penetration, water displacement and soil removal.

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