Best Vinyl Siding Cleaner

The right vinyl siding cleaner depends on the stain: a mild detergent for dirt and pollen, a cleaner with chlorine or oxygen bleach for mildew and green algae, a degreaser for grill smoke, and a rust remover labeled safe for vinyl for orange sprinkler stains. Whatever you choose, test it on a hidden spot first and rinse it off well.

Looking For A Siding Cleaner?

Are you in the market for a vinyl siding cleaner? We know that there are so many options to choose from, so here is a guide of cleaners that will get your home cleaner than ever!

In the previous article we published, we talked about how to clean vinyl siding. There, you will find some cleaners, cleaning solutions, and a step by step list on how to clean your house. Here we are going to expound more on the cleaners you may use

What To Consider When Cleaning Vinyl Siding

Here is a list of things you must consider as you prepare to clean your house.

Size of your home Type of siding House surroundings (flowers, bushes, grass, shrubbery) What is on your house (Is it dirty with algae, mold, dirt etc…)

These considerations will help you answer the following questions when looking for vinyl siding cleaner

How Much Do I Need? What Strength Should I Use? Which Cleaner Do I Buy?

Professional Opinions On Cleaning With Bleach

Now, there is a wide variety of cleaners and solutions that people use to clean vinyl siding. We have spoken with many experts in the industry and found that there are many different opinions. Principally, we’ve found that there is a conflict of opinion among the experts about if bleach is okay to use on siding or not.

We received input from a number of experts in the industry. We posed them this question:

Is it OK to use bleach to clean vinyl siding?

YES

84%

16%

Using Bleach as Cleaner

Most professionals we talked to said it that bleach is okay to use as long as you know what you are doing and exactly how to use it.

Of the 84% that said to use bleach, 19% specified by saying that is important to use SH bleach (Sodium Hypochlorite). The others didn’t specify what type of bleach they use. But normal clorox bleach contains about 5-7% active sodium hypochlorite. You can check out Clorox to know more about the chemical makeup of bleach.

We talked to 20 professionals and got their opinion on using bleach as a vinyl siding cleaner. The results were pretty clear. Most professionals trust bleach to clean algae and mold off siding. They emphasized that it is important to know how to use the bleach.

Obviously, you’re not going to use pure bleach in order to clean your siding. You’ll need to dilute the bleach into a water or cleaning solution. A diluted bleach solution makes it safe for using around plants and shrubbery.

Siding Cleaners We Recommend

Here is a list of other cleaners we recommend using!

Krud Kutter 5 gal. Exterior Siding Cleaner

They call this cleaner the ultimate siding cleaner. It contains Sporex which is added in order to remove mold, mildew, algae, fungus, and moss. Even the toughest stains from oil, bird droppings, dirt, tree sap, and acid rain can be removed with this cleaner. This cleaner should not be mixed with any other cleaners. In order to read more about Krud Kutter Exterior Siding Cleaner, go read the product description on their site.

Zinsser 1 gal. Jomax House Cleaner and Mildew Killer

This cleaner is recommended because it removes stains without scrubbing! It needs to be mixed with water and bleach in order to take full effect. it is powerful enough to get mold and mildew off your house and it removes dirt and stains without scrubbing! This cleaner should be used on non-porous surfaces. It won’t harm plants or shrubbery, but should be kept away from lakes, streams, ponds, etc. See here for more information

Simple Green 128 oz. House and Siding Cleaner Pressure Washer Concentrate

This is another versatile cleaner that can be either used in a pressure washer or it can be used manually as well! We call this one versatile because it is a perfect choice for cleaning vinyl, aluminum, shake, shingle, and panel siding, as well as terra cotta. It cleans oxidized paint, brightens wood, and removes heavy grease, grime, dirt, and soot!

ZEP 128 oz. House and Siding Pressure Wash Concentrate

This cleaner is specially formulated for pressure wash machines. It is an aggressive cleaner that attacks algae, mold, mildew, and other stains on vinyl siding. The 128 oz case makes up to 20 gallons and will cover up to 5,000 sq. ft. It is sold in a 4 pack, that would be a good option if you’re looking at a big house. For more specs about this product, go see the ZEP site

Spray & Forget 64 Oz. Bottle House and Deck Cleaner  This is the most unique cleaner we are listing. It is unique because of the ease of use it provides! The name pretty much sums it up. All you have to do is spray and forget! It gets rid of green and black stains (caused by algae, mold, and mildew). This cleaner doesn’t contain bleach, acid, lye or phosphates. It is eco-friendly.

Resources

The opinions we received were taken from a conversation held on Facebook with professionals in a closed Facebook group full of professionals in the industry.

Choosing a vinyl siding cleaner by the stain

Most siding needs nothing stronger than dirt removal. Road dust, pollen and spider webs come off with a mild detergent made for siding, or a little dish soap in a bucket of water, plus a soft brush or a low-pressure rinse. Stronger products do not lift plain dirt any faster; they only add risk to the plants below.

Mildew and green algae are living growth, and they need a cleaner that kills them. That means a product based on sodium hypochlorite, the active ingredient in chlorine bleach, or one based on oxygen bleach. The label usually mentions mildew, mold or algae. Grease from a grill vent or kitchen exhaust is different again and needs a degreaser.

Rust stains are the one bleach does nothing for. Orange streaks from iron in well water, rusty nails or old fixtures need a cleaner made to dissolve rust, often one based on oxalic acid, used exactly as the label directs and rinsed off thoroughly. Read every label for whether the product is safe on vinyl and on painted surfaces, and test it on a hidden spot before doing a whole wall.

Cleaning vinyl siding with bleach safely

Bleach works well on mildew and algae, and many siding makers' care guides include a diluted bleach solution. The risks are mostly to everything around the siding. Never mix bleach with ammonia, vinegar or other acidic or ammonia-based cleaners; together they give off dangerous gases. Combine it only with water and a detergent whose label says it is safe to mix with bleach.

Soak the plants, grass and soil below the wall before you start and rinse them again when you finish. Work in the shade or on a cool, cloudy day so the solution does not dry on the siding before you rinse it. Wear gloves and eye protection, keep children and pets away from the area, and wear clothes you do not mind spotting.

Household bleach loses strength as it sits, faster in heat, so an old jug from a hot garage may barely work. Rinse metal fixtures, light housings and window frames well, since chlorine left on metal can corrode it. If the mix drifts onto a painted door, stained wood or brick, rinse it right away to limit spotting.

Oxygen bleach vs chlorine bleach for siding

Oxygen bleach is sold as a powder, sodium percarbonate, that releases hydrogen peroxide when it dissolves in water. It is gentler on plants and leaves no chlorine smell. It works more slowly, likes warm water, and does its job when it is given time to sit and is scrubbed in rather than sprayed on and rinsed straight off.

Chlorine bleach acts fast and lightens stains while you watch, which is why many professional house washers rely on it. It needs more care around landscaping, metal and painted trim, and the diluted mix must be rinsed off thoroughly.

Both do the job. For a homeowner washing a wall by hand with a brush and bucket, oxygen bleach is the more forgiving choice. For heavy growth across a large, tall house, a chlorine-based cleaner applied at low pressure works faster, and that is often a job for a house washer who has the right pump and knows how to protect the yard.

How much vinyl siding cleaner do you need?

Start with the wall area. Measure around the outside of the house and multiply by the wall height for each story. For each gable end, add half the gable's width times its height. Subtract the big openings such as garage doors and picture windows. The result is a rough square footage of siding to clean.

Then read the label. Concentrates list how much water to mix in and roughly how many square feet a gallon of mixed solution covers. Hand washing with a brush and bucket uses more solution per square foot than spraying does, and a pressure washer's soap injector dilutes the concentrate again as it draws it in, so check whether the label's coverage assumes a pump sprayer or a pressure washer.

Buy a little more than the math says. Rough or textured siding, heavy growth and walls that need a second pass all use extra. Unopened concentrate keeps if it is sealed and stored out of the heat, but mixed solution, especially anything with bleach in it, should be used the day you mix it.

Questions people ask

Is it safe to clean vinyl siding with bleach?

Yes, when it is diluted and rinsed off. Diluted bleach does not harm the vinyl, but it can hurt plants, metal fixtures and painted trim, and it must never be mixed with ammonia or acids. Wet the plants first, keep the solution from drying on the wall, and rinse thoroughly.

Does Spray and Forget work on vinyl siding?

Its maker sells a house and deck version meant to be sprayed on and left, with rain and weather removing green and black growth gradually instead of a rinse doing it. Results come slowly, so if you need the wall clean the same day, a wash-and-rinse cleaner is the quicker route.

What removes rust stains from vinyl siding?

A rust remover labeled safe for siding, often based on oxalic acid. Bleach and ordinary siding cleaners do not lift rust. Test it on a hidden spot, follow the label and rinse well, then aim sprinklers away from the wall if well water caused the stains.

Can I use dish soap to clean vinyl siding?

Yes, for ordinary dirt and pollen. A small squeeze of dish soap in a bucket of water with a soft brush handles light grime. It will not kill mildew or algae, so pair it with a cleaner made for those if green or black growth is present.

This guide was updated in October 2026 with new sections and the questions people ask most.