How To Remove Stains From An Asphalt Driveway

By Joe Spadino | July 31, 2020
Oil Stain On Asphalt Driveway

Welcome to Blacktop Concepts’ comprehensive guide on how to remove stains from an asphalt driveway. Having been in the residential asphalt paving business for over 45 years, it’s safe to say that our crew has seen their fair share of stained driveways. 

While seeing stained asphalt is quite common, the effects of staining are often overlooked. Though most people rarely view stains as anything more than an eyesore, the truth is that certain stains can put the lifespan of your driveway at risk. Knowing how to properly remove stains from your driveway will help you keep it looking new and ensure its longevity. In this guide, we’ll share valuable information and tips on:

The Unseen Threat of Asphalt Stains

Asphalt driveways can last a very long time if they are properly taken care of, but if oil and chemical spills are ignored, it can shorten the lifespan of your driveway. In fact, there are certain types of spills and stains that can negatively affect the underlying structure of your driveway if they are left untreated. Spills that involve oil and other automotive lubricating fluids such as brake fluid, transmission fluid, and power steering fluid can degrade and weaken the asphalt that binds your driveway together.

How Oil Stains Can Harm Your Asphalt Driveway

Even though asphalt itself is a byproduct of the petroleum refining process, oil spills are harmful to asphalt. This is because asphalt uses bitumen as a binder. Bitumen is added to help driveways keep their shape over time and is largely responsible for the longevity and durability that asphalt is known for. Without the binding agent, the asphalt mix would mostly consist of gravel, which wouldn’t hold up well over the long run. This is especially true for asphalt driveways in Wisconsin where the cold winters bring freezing cold temperatures, salted roads, and ice – all of which put a lot of stress on your driveway.

Moreover, unintended oil spills can disrupt the chemical balance between gravel and bitumen leading to surface deterioration, weakened cohesion, and even cracks. When stains are left untreated, these seemingly minor defects can escalate into more significant issues, compromising both the visual appeal and structural integrity of your driveway. In colder climates, like Minnesota, harsh winters will further challenge the structural integrity of your driveway causing those with aggressive stains to have a significantly shorter lifespan.

If you notice any oil on your driveway, it is important to take care of it quickly to avoid any potential for long-term damage. If you don’t remove the oil soon, cracks and potholes can develop in addition to the surface stains. 

Here Are A Few Tricks For Removing Oil Stains From Asphalt With Some Simple Household Items

When it comes to cleaning oil stains from your driveway, there are a number of specially-designed products available on the market. While these can be effective, they’re often expensive and not always necessary to use. It may sound surprising, but you can often achieve excellent results using common household items you may already have. These readily available alternatives can be just as effective as commercial products, not to mention more budget-friendly and environmentally conscious. Below are 6 household items that are effective at removing driveway stains.

Using Kitty Litter To Remove Stains From Your Driveway

Kitty litter proves to be a remarkable solution for combating oil stains on your driveway. Crafted with absorbent materials like natural clay or silica, it quickly absorbs oil from the asphalt’s surface. Its porous texture facilitates oil molecule adherence, effectively lifting the stains away as you press the litter into the pavement. 

kitty litter’s non-abrasive nature ensures that it won’t harm your driveway’s surface, providing a safe and gentle means of stain removal. 

If you decide to treat an oil stain with kitty litter, the first step is to mop up any excess oil with a mop or an absorbent cloth. After that, cover the oil stain with a bag of non-clumping kitty litter. Stomp the kitty litter into the asphalt to help absorb more of the oil. Let the litter sit out overnight. Finally, you can scoop up the litter and properly dispose of the waste.

How To Treat Driveway Stains With Laundry Detergent

Laundry detergent’s ability to effectively tackle grease and oil, along with the fact that it can be found in almost every household in the country, makes it a great option for cleaning driveway stains.

By scrubbing the affected area with a stiff brush and allowing the solution to sit, the detergent’s emulsifying properties break down the oil, making it easier to rinse away with a hose. This accessible solution offers an eco-friendly and budget-conscious approach to stain removal, preserving both the aesthetics and longevity of your driveway.

Remove Oil Stains From Your Driveway With Dish Soap

While unexpected, dish soap is a highly effective remedy for removing oil stains on your driveway. Known for its grease-cutting abilities, dish soap contains surfactants that break down oil molecules on contact. By mixing dish soap with water and using a stiff-bristled brush, you create an emulsifying action that lifts the oil from the asphalt’s surface and also helps prevent new oil spills from further drying, solidifying, and staining.

How To Treat Asphalt Stains With Baking Soda

Baking Soda is a common kitchen ingredient that has a natural tendency to absorb oil and grease. These natural absorbent qualities make it a great option for soaking up fresh oil spills on your asphalt driveway. 

By applying baking soda to the stain and scrubbing the area with a stiff brush, you facilitate the absorption process. Just make sure you give it enough time to rest, typically 30-60 minutes. After the resting period, rinse the area with a hose to reveal a cleaner, oil-free driveway. This environmentally friendly solution provides a simple yet effective method for maintaining the pristine appearance of your driveway.

Remove Stains From An Asphalt Driveway With Coke (Coca-Cola)

While unconventional, Coca-Cola is a surprisingly effective choice for treating driveway stains. Its acidity and carbonation work together to break down oil compounds. By pouring a can of Coca-Cola onto the stain and allowing it to sit overnight, you create an environment where the liquid can penetrate and loosen the oil.

The following day, scrub the area to lift the stain, then rinse with water. Depending on the severity of the stain, you may need to repeat this process multiple times.

Though this method may seem unconventional, it offers an interesting and effective alternative for homeowners looking to restore the allure of their driveways using a common item that can be found in most homes.

How Treat Driveway Stains With Microbial Asphalt Cleaner

Microbial asphalt cleaner introduces a modern approach to stain removal. Harnessing the power of specialized microbes, this cleaner literally consumes oil stains, converting them into harmless waste like carbon dioxide. Specifically engineered for asphalt, microbial cleaners provide a targeted solution that tackles stains without harming the pavement’s integrity. Microbial asphalt cleaner presents an eco-friendly, specially formulated solution that will eliminate stains from your driveway while ensuring that the aesthetic and structural integrity is kept intact.

What Not To Do When Addressing Stains

There are many helpful tools and techniques for removing stains from your asphalt driveway, but there are a few things that can do unintentional harm. Avoid using:

  • Pressure Washers
  • Metal Wire Brooms/Brushes

Why You Should Avoid Cleaning An Asphalt Driveway With a Pressure Washer

Pressure washers can damage the top layer of the pavement. It may not happen the first time, but repeated pressure washing can erode the top layers of your driveway. This is because the force from the intense water pressure can cause cracking, premature aging, and even irreparable damage. Opt for gentler methods to safeguard your driveway’s integrity and avoid costly repairs down the road.

Why You Should Avoid Cleaning Asphalt With Metal Wire Brushes

Steer clear of metal wire brushes when cleaning asphalt. Despite their scrubbing power, these brushes can scratch and damage the asphalt’s surface, compromising its integrity. The abrasiveness of metal bristles leads to unwanted marks, accelerated wear, and the potential for deep-seated damage

DO NOT USE SOLVENTS TO CLEAN STAINS ON ASPHALT

Solvents will dissolve and erode the asphalt binder that holds your driveway together, which defeats one of the purposes of cleaning an oil spill in the first place. There are a handful of household substances that contain solvents and should not be used on a blacktop. 

Here are some examples of common household cleaners/products that contain solvents:

  • Acetone
  • Nail Polish Remover
  • Spot Removers
  • Paint Strippers & Paint Thinners
  • Turpentine
  • Kerosene
  • Antifreeze
  • Rug Cleaners
  • Drain Cleaners
  • Etc.

Be careful what you use on your blacktop. You may think that household cleaners can be applied everywhere but they can do more harm than good in some cases. 

Even if you’re careful to avoid spills on your asphalt driveway, accidents happen. When the inevitable stain happens, you can use the above information to keep your driveway looking great and prevent any premature damage. If your driveway suffered extensive damage from untreated oil and chemical spills it may be time to repair or replace it. In this case, the best option is to call the experienced professionals at Blacktop Concepts. 

Schedule an estimate today

Posted in Driveway Maintenance & Care