The Best Pressure Washer Detergent 2020 Reviews

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What’s the best pressure washer detergent to get for cleaning your home? Check out our guide to know which products you should consider choosing for your home.

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When you use a pressure washer, you must always use detergent along with it.


Because the detergent helps loosen up the dirt and grime. This makes it so much easier for you to wash them away.

Of course, there are so many different types of pressure washer detergents in the market. Which one is the best pressure washer detergent for your needs?

Let’s check out this short guide to find out which one you should use.

Top 5 Pressure Washer Detergent Reviews (Quick Look)




Sun Joe SPX3000 Pressure Joe 2030 PSI

#1. Mold Armor 1 Gallon House Wash

Simpson Cleaning MSH3125-S 3200 PSI

#2. Krud Kutter Pressure Washer Concentrate

GreenWorks 1500 PSI 1.2 GPM

#3. Sun Joe Snow Foam Cannon

WEN PW31 3100 PSI Gas Pressure Washer

#4. Sun Joe House And Deck All Purpose Detergent

AR Blue Clean AR390SS 2000 PSI

#5. Zep House and Pressure Washing Cleaner

5 Best Pressure Washer Detergent For Cars

Now that we’ve gone through the buying guide, we can move on to the reviews. In our opinion, these are the 5 best detergents that you can find in the market.

Let’s discuss them one by one:

#1 Mold Armor 1 Gallon House Wash

If you’re looking for something with power to kill those pesky molds and mildew, this is a great choice to have. It is powerful enough to clean molds but also gentle enough to handle normal stains on vinyl, wood, and stucco material. This is a great all-around pressure washing detergent that’s rather versatile if you need an all-purpose type of soap. All you need to do is to dilute it with a 3:1 ratio wherein 1 part is the cleaner and 3 parts is water.

Mold Armor 1 Gallon House Wash


Best Features:

  • Versatile purpose
  • Very strong against mold, mildew, and even algae
  • Can take away even the regular stains
  • check
    Has a coverage of up to 2,000 square feet
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    Can be used on various materials like aluminum, wood, stucco, concrete, and vinyl
  • check
    Can be used on gardens and outdoor landscape

#2 Krud Kutter Pressure Washer Concentrate

The specialty of this detergent is that it can dissolve extremely sticky stains such as those oily and greasy debris. This is a great detergent if you need to clean oil from wood or glass. Aside from its amazing ability to dissolve grease, it also contains a special formula known as Sporex ,which allows it to also remove mold and fungus. Thus, if you notice that there are some undesirable substances growing on your home sidings, then this is a good detergent to carry around. Just make sure to mix it with water at a ratio of 10:1 wherein you’ll mix 10 parts water and 1 part cleaner.

Krud Kutter Pressure Washer Concentrate


Best Features:

  • Good for dissolving grease and oil
  • Effective in taking away mold and fungus
  • Has a coverage of 2000 square feet
  • check
    Has the ability to wash away gray discoloration on wood

#3 Sun Joe Snow Foam Cannon Pressure Washer Detergent

This is probably the safest detergents that you’ll find on this list. As compared to a lot of detergents, this one is biodegradable and is very safe for use on various surfaces. Specifically, it can be used on both wood and metal surfaces without much issue. This is especially useful if you need to clean surfaces with applied sealants on them. While most detergents may melt the sealants away, this one doesn’t.

Sun Joe Snow Foam Cannon Pressure Washer Detergent


Best Features:

  • Very safe application
  • Biodegradable material
  • Can be used on metal and wood surfaces
  • check
    Does not melt sealants or wax seals
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    Has the ability to loosen sticky grime and stubborn dirt
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    Not harmful to skin

#4 Sun Joe House And Deck All Purpose Detergent

Just like the previously mentioned Sun Joe detergent, this one is also very safe to use. It’s biodegradable and non-toxic meaning it is safe for use even around children and pets. The difference between this one and the previously mentioned one is that this one can be used for heavy duty house cleaning— without the toxicity of bleach. Just so you know, this detergent is bleach free but almost has the strength of detergents that contain bleach. While it can’t really take away molds that effectively, it’s very efficient in washing away stubborn grime and dirt.

Sun Joe House and Deck All Purpose Detergent


Best Features:

  • Safe for use around children and pets
  • Non-toxic and does not contain bleach
  • Biodegradable material
  • check
    Can be used on wood, brick and stucco

#5 Zep House and Pressure Washing Cleaner

This one is probably the most powerful of all the choices on the list. Of course, its power means that it has a high toxicity level. This means that you may only want to use it if you have extremely hard-to-remove mildew, mold, or debris stains that ordinary detergent can’t take out. It can be used for various materials like wood, aluminum, fiber, stucco, brick and more. It also has a coverage of 5000 square feet because it comes in a package of 20 gallons. As you can see, this is a construction grade detergent so it’s very useful if you’re cleaning a big house that has a lot of mold and dirt. It’s also useful if your home has a lot of areas that need deep cleaning.

Zep House and Pressure Washing Cleaner


Best Features:

  • Very powerful formulation
  • Has a coverage of 5000 square feet
  • Can be used for any type of surface

Is It Safe To Use Power Washer Detergent?

Generally, detergent used in pressure washers are safe, so you don’t need to worry too much about them. That being said, they still have a high chemical content; thus, you still have to be careful using them. Most mild detergents don’t really harm your skin or the environment because their chemical content is limited to a certain amount. The best pressure washer detergent for stucco and the best pressure washer detergent for vinyl siding are usually the weaker and mild ones since these don’t cause discoloration or damage to the material.

However, stronger and more heavy-duty detergents may be harmful to the skin or bad for the environment. That’s why you should always have to take precautions when you use them. These are usually the ones used for cleaning away mold or mildew. The best pressure washer detergent for mold is always the very strong ones because you’ll need high strength to destroy stubborn mold. When dealing with this type of detergent, we suggest you always use a pair of rubber gloves and wear long sleeves so that they don’t get on you.

As long as you take precautions, you should have absolutely nothing to worry about.

Choosing The Best Washing Detergent

Now that we’ve established some safety concerns regarding the use of pressure washing detergents, we can slowly discuss our reviews. Before picking out the best detergent to use with pressure washer, let’s first talk about how to choose the best one for your situation.

Take note that there are many types of pressure washing detergents in the market. It’s up to you to know how to pick the best pressure washer detergent for bricks and the best power washer detergent for windows and cars. To know that, you’ll need some criteria to help you make the right choice.

To make things much easier, we took the liberty to create a list of criteria for you. These factors will help you differentiate the different detergents out there so that you’ll know which one is best for what type of cleaning job.

  • Strength

The first thing that you have to take into consideration is strength. If you’re looking for something mild, then even dishwashing liquid will already do. However, more stubborn dirt may require a little more strength than that. If you want medium strength detergents, you can look for ingredients like vinegar, oxalic acid, and citric acid. On the other hand, the stronger detergents may have bleach, ammonia, and hydroxide ingredients.

  • Purpose

In order to determine what strength of detergent you should buy; you must first take into consideration the purpose. Various ingredients are added for various purposes.

For instance, if you want to general clean and polish your deck, then the best pressure washer detergent for decks are the vinegar with citric acid-based types. Vinegar is great for overall cleaning while citric acid is great for handling stains on hard surfaces like concrete. In fact, detergents with high citric acid levels are usually used for cleaning driveways and patios.

If you’re looking for a rust remover, then a great option is a detergent that has oxalic acid. These types of detergents are the kinds that you apply on metal home parts like your vents or even your metal roof. For cleaning grease and oil stains (these usually appear on glass surfaces), you may consider getting detergents with ammonia or sodium hydroxide in them. These ingredients are great for dissolving sticky and greasy substances.

For molds and mildew, you’ll need something much stronger than any of these ingredients. In fact, you’ll need bleach to take away these substances. Bleach is typically made out of both sodium hydroxide and sodium hypochlorite. The combination makes a great disinfectant that can wash away the molds and algae.

  • Size

You should also consider the size of the detergent. Typically, you can buy a 1 or 2 gallon detergent bottle. The size is important because it determines how much you’ll have in reserve. If you pressure wash your house regularly, then it’s good to have a gallon in reserve. If you plan to clean your whole house completely, maybe a 2-gallon bottle needs to be used.

  • Coverage

The size is also directly related to the coverage of the detergent. Coverage refers to how many square feet your detergent can cover. It’s just a range that can tell you how much of your patio/driveway/house can cover. A typical 1-gallon sized container can cover up to 2,000 square feet.

  • Scent

This isn’t such a crucial factor, but some people are very particular when it comes to smell. Some detergents come with nice smells such as vanilla, pineapple or coconut. Do take note that the stronger bleach-based detergents don’t have odor— just that strong bleach smell. Therefore, if you’re buying a heavy duty grade detergent, don’t expect any scent.

  • Brand And Price

The last thing that you need to take into consideration is the brand and price. As a general rule, we don’t recommend buying cheap detergent from unknown brands. We only suggest that you buy from well-known brands so that you can assure safety for yourself and your family members. Fortunately, the brands that we’ve listed in our reviews below are all reputable brands. With reputable brands like this, you can be ensured of quality.


While we recommend that you buy at least one bottle of all these detergents, we still are partial to just one of these choices. Our main choice will always be the Mold Armor 1 Gallon House Wash. For us, this is the most versatile detergent of all 5 products. While it specializes in taking out molds and mildew, it’s also pretty efficient in washing off regular dirt stains on any material. It’s both strong and gentle at the same time.

We’d say that this is a great all-round type of detergent that’s great for any job. That’s why we consider it the best pressure washer detergent.

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Mattie Keyes

Hi there! This is Mattie. When I am not making DIY projects for my house, I spend most of my time researching and writing reviews of different products that you can buy online. I am an office worker turn full-time blogger, and I hope to help other homeowners like me on how to improve and reinvent your home using the best ideas and equipment.