How to Use WD-40 to Remove Tar From Surfaces

WD-40 works on tar because it dissolves the adhesive bonds that make tar stick

WD-40 is a penetrating oil that breaks down the molecular structure of tar, making it easier to wipe away rather than scrape. When you spray WD-40 on tar, the oil seeps into the tar's surface and weakens the grip it has on whatever it's stuck to — your car's paint, clothing, skin, or concrete. The solvent in WD-40 doesn't remove tar when ready, but it softens it enough that you can rub or wipe it off without damaging the underlying surface the way a razor blade or wire brush might.

Tar removal with WD-40 works best on fresh or semi-dried tar. Old, hardened tar that has been baking in the sun for weeks may need longer soaking or repeated applications. The process is straightforward: spray, wait, and wipe. Most people see results within five to fifteen minutes, though patience and a second process often work better than aggressive scrubbing on the first try.

Key Takeaways

WD-40 dissolves tar by breaking down its adhesive properties, making it removable without scraping or damaging the surface underneath.
Spray WD-40 directly onto the tar, let it soak for five to fifteen minutes, then wipe with a soft cloth or plastic scraper.
On car paint, test WD-40 on a hidden area first, and avoid letting it sit for more than thirty minutes before wiping.
For skin or clothing, WD-40 works but can leave an oily residue that requires soap and water or a degreaser to remove completely.
Tar on concrete or asphalt may need multiple applications and longer soaking times, especially if the tar is old or thick.

Removing tar from car paint with WD-40

Car paint is the most common place people use WD-40 for tar removal, because road tar sticks aggressively and is hard to remove without damaging the clear coat. Spray WD-40 directly onto the tar spot and let it soak for ten to fifteen minutes. The oil will penetrate the tar and loosen its grip on the paint. Use a soft microfiber cloth or a plastic scraper — never steel wool or a metal blade — to gently rub or scrape the tar away. Wipe the area with the cloth in circular motions, reapplying WD-40 if the tar resists.

Test WD-40 on a small, hidden area of your car first, such as inside the fuel door or on the underside of a bumper. While WD-40 is generally safe on automotive paint, some finishes or waxes can react unpredictably. Once you've confirmed it doesn't dull or damage your specific paint, you can use it on visible tar spots. After the tar is gone, wash the area with soap and water to remove the oily residue, then dry and wax if needed to restore the finish.

Using WD-40 on skin and clothing

WD-40 removes tar from skin and fabric, but it leaves behind an oily film that requires additional cleaning. Spray WD-40 onto the tar on your skin or clothing and let it sit for a few minutes. Gently rub the tar with your fingers or a soft cloth — the tar will ball up and roll off as the oil breaks down the adhesive. For clothing, avoid rubbing too hard, as you risk pushing the tar deeper into the fibers.

After the tar is removed, wash the affected area thoroughly with soap and warm water. You may need to wash twice or use a degreaser like dish soap to cut through the WD-40 residue. On skin, regular hand soap works, but a pumice stone or nail brush can help remove stubborn bits. Avoid using WD-40 on sensitive areas like the face or eyes, and wash your hands after handling it.

Removing tar from concrete and asphalt

Tar on driveways, parking lots, or concrete surfaces is often thicker and more stubborn than tar on paint or skin. Spray WD-40 generously over the tar and allow it to soak for twenty to thirty minutes. For large patches, you may need to reapply halfway through. Once the tar has softened, use a plastic scraper or putty knife to lift it away. Work from the edges of the tar spot toward the center to avoid spreading it.

Multiple applications may be necessary for old or deeply embedded tar. After each scraping, spray more WD-40 and wait again. Once most of the tar is gone, spray the remaining residue and wipe with a cloth. For very stubborn spots, a pressure washer set to low pressure can help rinse away loosened tar, but avoid high pressure, which can damage the concrete surface. Allow the area to dry completely before walking or driving on it.

How long WD-40 takes to work on tar

WD-40 begins penetrating tar when ready, but you'll see the best results if you wait five to fifteen minutes before wiping. On fresh tar, five minutes is often enough. On older, harder tar, fifteen to thirty minutes gives the oil time to fully soften the adhesive. Waiting longer than thirty minutes on car paint is not recommended, as the WD-40 can begin to affect the wax or clear coat if left too long.

If tar doesn't come off after one process and waiting period, spray again and wait another ten to fifteen minutes. Patience works better than force — aggressive scrubbing before the tar is fully softened risks scratching paint or tearing fabric. Most tar removal with WD-40 takes between fifteen and forty-five minutes total, including multiple applications if needed.

Alternatives to WD-40 for tar removal

Other products remove tar similarly to WD-40. Mineral spirits, a common paint thinner, dissolves tar effectively and is often preferred by detailers because it evaporates faster and leaves less residue. Rubbing alcohol works on skin and light tar but is slower than WD-40 or mineral spirits. Goo Gone, a commercial adhesive remover, is formulated specifically for sticky substances and works well on tar, though it's more expensive than WD-40.

For car paint, some people use clay bars designed for detailing, which physically lift tar and contaminants without chemicals. These require a lubricant like a clay bar lubricant or soapy water to work. On skin, warm soapy water alone can remove fresh tar if you're patient, though it takes longer than oil-based solutions. The choice depends on what you have on hand, how much tar you're dealing with, and whether you prioritize speed or minimal residue.

Safety and precautions when using WD-40

WD-40 is flammable and should not be used near open flames, sparks, or hot surfaces. Use it in a well-ventilated area to avoid inhaling fumes. Wear gloves if you have sensitive skin, as prolonged contact can cause irritation. Keep WD-40 away from eyes and mucous membranes. If you get WD-40 in your eyes, rinse when ready with water for at least fifteen minutes and seek medical attention if irritation persists.

On car paint, avoid spraying WD-40 on hot surfaces — wait until the car has cooled after driving. Do not let WD-40 dry on paint; always wipe it off within thirty minutes. Store WD-40 in a cool, dry place away from direct sunlight and heat. Check the product label for any specific warnings related to the surface you're treating, as some finishes or materials may have special considerations.

Frequently Asked Questions

Will WD-40 damage my car's paint or clear coat?

WD-40 is generally safe on automotive paint when used correctly, but test it on a hidden area first. The key is not leaving it on the paint for more than thirty minutes — wipe it off promptly after the tar is removed. Some waxes or finishes may react differently, so a small test prevents surprises on visible areas.

Can I use WD-40 to remove tar from my skin?

Yes, WD-40 removes tar from skin effectively, but it leaves an oily residue. Spray it on, wait a few minutes, rub gently to roll off the tar, then wash thoroughly with soap and warm water. Avoid using it on sensitive areas like the face or near eyes.

How many times can I reapply WD-40 to the same tar spot?

You can reapply WD-40 as many times as needed. Spray, wait ten to fifteen minutes, wipe, and repeat if tar remains. Most spots come off within two or three applications, but very old or thick tar may need more. There's no limit to reapplication, but patience between coats works better than constant scrubbing.

Is WD-40 better than mineral spirits for tar removal?

Both work similarly, but mineral spirits evaporates faster and leaves less oily residue, making it preferred by car detailers. WD-40 is more accessible and works just as well if you're willing to do extra wiping afterward. Choose based on what you have available and your tolerance for cleanup.

What should I do if WD-40 doesn't remove all the tar?

Reapply and wait longer — old tar sometimes needs thirty minutes or more to fully soften. If WD-40 alone doesn't work, try mineral spirits or Goo Gone next. On car paint, a clay bar designed for detailing can lift remaining residue after chemical treatment.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.