In case you don’t have time to go through the whole article, and just want to know what the best vinyl siding cleaner for pressure washer is, then our recommendation is the Oxy Solve Total Outdoor.

A good cleaner is an important component of any successful pressure washing job. The detergent helps the machine work effectively and properly. Just add the detergent to the attached tank and it automatically combines with water as it comes out of the sprayer. It’s that easy.

It’s important to use a quality detergent that won’t harm the vinyl siding you are cleaning, or your hands. While there are tons of pressure washer detergents on the market, it’s important to look for a branded one that doesn’t use harmful chemicals. Here you will find a few tips and reviews to help you choose the best vinyl siding cleaner for pressure washer for your home.

A Quick View of Our Rating

Our #1 rated – Oxy Solve Total Outdoor

Our #2 rated – Zep House and Siding

Our #3 rated – Sun Joe SPX-APC1G

Our #4 rated – Home Armor FG503 E-Z

Our #5 rated – Wet & Forget Outdoor Cleaner

Features to Look for in a Vinyl Siding Cleaner

When shopping for a pressure washer detergent, consider whether or not it will harm the environment. If you have a situation where you do have to use something stronger, make sure to use the right precautions to minimize harm. Always read ingredients to make sure they are both safe for the environment as well as your skin.

And, depending on the stains and dirt, on your home, it’s important to look for something that serves your particular goal. Remember that a pressure washer is a versatile device when it comes to cleaning since it allows you to clean lots of different things outside including driveways, fences, decks, etc.

Just make sure you match the pressure washer cleaners to the task you have at hand since different cleaners are better at different tasks. Do your research and don’t just use any old cleaner.

Hard Water

What makes water hard? It’s actually the high level of minerals that water contains. Those that live in an area with hard water are well aware of the issues hard water can cause. Soap and hard water do not work well together since the combination of the two causes a reaction known as soap scum.

Depending on the different parts of a cleaner, it can also leave water spots on surfaces after you have washed it, which can be frustrating and more work to remove.

Detergent vs. Soap

Sometimes the words soap and detergent become interchangeable when talking about the same product. While many people consider these two things to be the same, they are actually very different things. Typically, a pressure washer detergent is a concentrate made with chemicals while soap is a cleaning product that uses natural ingredients. Here are a few other points to help show the difference between the two.


While both detergent and soap are cleaning products, they are made using two different components. Soap is created using natural ingredients including plant oils like pine, palm, vegetable, and coconut mixed with animal fat. This combination of salt and raw products is processed into glycerin and fatty acids using steam.

A liquid soap uses potassium as the salt while bar soap uses sodium. At its lowest level, soap is combined with water, which can later break down and dissolve the stain, dirt, or grime you want to clean. The drawback of soap is that water minerals can react with soap minerals and leave an insoluble film.


Detergents do not use natural ingredients. Chemicals for detergents were developed during WWII when there weren’t enough oils available to make soap. A detergent is used to clean clothes and remove tough stains using non-alkaline carbonic compounds and salt composition.

With different levels of sensitivity to hard and soft water, detergents will have different chemical compositions. In hard water, you have too much calcium and magnesium causing soap to quickly leave as magnesium or calcium salts, which is also referred to as hard water scum. In comparison, a detergent has a different chemical composition making it less susceptible to the effects of hard water.


If you aren’t careful, you can kill shrubs and grass near the area of you are pressure washing. Due to harsh chemicals in some cleaners, it is easy to discolor paint or damage landscaping. It’s also not a great idea to use bleach in your pressure washer since it can harm the internal parts of a pressure washer depending on its injector system.

If you are using it in your driveway, it’s also possible for the detergent to run into your street and the storm pipe system ultimately ending up in a waterway. Always consider the injector system and your purpose before you choose a detergent to ensure that you are using it safely.


When washing any surface, you will want to make sure you have a detergent that won’t cause any damage if it gets into a storm drain, harm metals, or strip a painted surface. Look for detergents that are gentle and use natural ingredients instead of chemicals that may damage surfaces in your yard or on your home.

When you wash a walkway or driveway, a biodegradable cleaner is safer to use since it won’t harm your landscaping. If you are cleaning concrete, you want to allow the pressure to do the cleaning, but if you are removing mildew from siding on your house, you want a detergent that is going to fight the mold and mildew effectively.

Just remember to cover any flower beds or shrubs below the area you are cleaning to protect them. Always make sure you choose a detergent keeping the intended surface into consideration.

Injector System

Some pressure washers will be equipped with a downstream injector. This design allows the cleaner to come in after the pump providing you with more choices. When a pressure washer comes with an upstream injector, your cleaner will expose any chemicals found in the formula as it goes through the pump. When this happens, any harsh chemicals in the mix can damage the pump, so keep that in mind as you choose a detergent.

Can You Use Dishwashing Detergent in a Pressure Washer?

Since dishwashing detergent is considered an abrasive soap to clean grease and oil on dishes, it can dull or damage shiny surfaces or paint. Typically, you will want to use a detergent that is designed to be used in a pressure washer. However, if you take the time to read the ingredients used in dishwashing detergent, it can help you better decide if they may be harmful to the surface you want to clean.

What is the Best Vinyl Siding Cleaner for Pressure Washer?


This all-purpose cleaner is also a heavy-duty degreaser that is made for pressure washers. It can remove mud, mildew, oil stains, grime, rust, and grease from metal, wood, or brick surfaces.

Available as a concentrate, just dilute the cleaner to the correct cleaning mixture to get the best cleaning results.

You can use this cleaner with a stiff bristle brush, mop, or a pressure washer that comes with a detergent injection system. It is a versatile product that is safe to use on metal surfaces. This biodegradable product is perfect for tackling those tough cleaning tasks to get rid of stubborn dirt and grim.


  • Versatile enough to use it on different surfaces
  • Good cleaner to get rid of dirt and mildew
  • Easy to use
  • Biodegradable


  • Not a very strong product
  • Not for driveways

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Home Armor FG503 E-Z

This is a great product for both homeowners and professionals. It is perfect for algae stains, mildew, or mold. It can be used to wash the outside of your house with a pressure washer, sponge, roller, tank sprayer, or garden sprayer.

It is ideal for use on fences, painted decks, trim, concrete, stucco, brick, wood siding, aluminum siding, and vinyl.

It is safe to use at full strength for heavy soil and stains while typical dirt and stains can use a diluted version. You won’t have to scrub with this formula, and one gallon can cover up to 2,000 sq. ft.


  • To use both full strength and diluted
  • One gallon covers a large area
  • Suitable for a lot of outside surfaces


  • Strong smell
  • It can take a couple of applications to work

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Zep House and Siding

This product removes stains and mildew from your home’s exterior. It can help to brighten a dull and dirty exterior, and increase the house’s curb appeal.

This is a professional grade formula that is perfect for both homeowners and professionals. This cleaner is a great choice for wood, aluminum, and vinyl siding, plus it can clean gutters, brick, and hard coat stucco.

One container can create up to 20 gallons of cleaning solution that can clean up to 5,000 sq. ft.


  • Cleans up to 5,000 sq. ft.
  • Strong professional grade formula
  • Also suitable for cleaning your home’s exterior


  • Weak performance on mildew
  • It can take a few applications to work

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Oxy Solve Total Outdoor

Able to remove dirt, mildew, and mold, this cleaner is a safe, non-toxic formula that uses peroxide to get rid of grime. This biodegradable formula is approved by the U.S. EPA’s Safer Choice Program.

Using the power of peroxide, it is a fast-acting foam with incredible cleaning power that doesn’t use bleach when removing grease, oil, and tree sap.

With no harsh chemicals, it can get rid of stains caused by algae, moss, mildew, and mold as well as grime and dirt. This concentrate is a good choice for asphalt, brick, stone, concrete, wicker, plastic, fabric, metal, vinyl, composite, and wood surfaces helping to remove weathering and oxidation.

It comes in a concentrate that can create enough cleaner to clean 6,400 sq. ft.


  • Biodegradable
  • It doesn’t use chemicals
  • It can get rid of moss and mildew
  • Concentrate cleans up to 6,400 sq. ft.


  • Not as effective as some users expected
  • It doesn’t work on hard to remove spots

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Wet & Forget Outdoor Cleaner

With this cleaner you can easily get rid of green and black stains from pretty much all outdoor surfaces. There is no need to scrub or use bleach since it can get rid of those stubborn stains just by applying the solution with a pressure washer or a garden sprayer. After it is applied, the solution works with the rain and wind to remove growth over time.

Not only will your surfaces stay clean, but they also stay clean for a year or more. You can use it on plastic, vinyl, painted surfaces, walkways, decks, roofs, and siding.

This is a bleach and phosphate-free product that is also non-acidic. This is a safe product that won’t harm any outdoor surface.


  • Phosphate-free and non-acidic
  • It keeps surfaces clean for a couple of years
  • Suitable for a lot of outside surfaces


  • Expensive
  • It takes a while to work

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Our Choice

We care not only about performance, but also about environment and safety. Having that in consideration, our decision is that the best vinyl siding cleaner for pressure washer is the Oxy Solve Total Outdoor.

It is biodegradable, safe and non-toxic. And you can clean up 6,400 sq. ft.

It is designed for use in a pressure washer, and it is also considered a heavy-duty degreaser giving it more versatility. It is able to remove algae, moss, mildew, and mold as well as grime and dirt from asphalt, brick, stone, concrete, wicker, plastic, fabric, metal, vinyl, composite, and wood surfaces.