10 Best Decking Cleaners 2025 in the United States

The 30 SECONDS Outdoor Cleaner 2 Pack with Hose End Sprayer is designed to tackle stains from algae, mold, mildew, and moss on a variety of surfaces including vinyl siding, wood decks, patios, and brick. Its primary strength lies in its versatility, being effective on multiple surfaces such as concrete sidewalks, asphalt driveways, plastic outdoor furniture, and more. The cleaner is user-friendly, requiring no pressure washing—just spray it on and hose it off, making it convenient for those who prefer a simple cleaning method. Additionally, it is safe for lawns and plants when used as directed, ensuring it does not harm your landscaping which is a significant benefit for outdoor cleaning products.

It’s important to note that the cleaner is a spray form and comes with a hose end sprayer, which might limit its application method flexibility for some users preferring different dispensing methods. The cleaning power is robust, rapidly targeting organic growth stains, but for heavily stained or larger areas, multiple applications may be required. Its safety and compatibility with various deck materials make it a strong candidate for those needing an efficient and straightforward decking cleaner. Potential users should consider the specific needs of their cleaning tasks, especially regarding the cleaner’s liquid volume and the ease of handling a 4-pound container.

The 30 SECONDS Outdoor Mold & Mildew Stain Remover is a concentrated liquid cleaner designed to tackle organic stains like algae, mold, and mildew on various outdoor surfaces. It stands out for its wide compatibility, effectively cleaning decks made of wood, composite, or stained materials, as well as concrete, brick, vinyl siding, fences, and more. This versatility makes it a good choice if you have multiple outdoor areas needing cleaning. The cleaning power is strong, with visible results appearing quickly after application, which is great if you want fast stain removal.

Mixing the concentrate with water in a 1:1 ratio keeps it easy to use, though it does require some preparation rather than being a ready-to-use spray. Its formula is plant and lawn safe when used as directed, which means you can confidently clean without worrying about harming nearby plants, a nice feature for garden-friendly households. However, you will still need to rinse the surfaces, and care should be taken to follow instructions to maintain safety.

One minor downside is that it comes as a gallon concentrate, which means handling a fairly large container and ensuring proper dilution—something to keep in mind if convenience or storage space is a priority. The product also has a wood scent, which some might find pleasant or might prefer fragrance-free options. This cleaner is a powerful and versatile option for homeowners looking to remove tough outdoor stains safely across different materials. Those comfortable with mixing concentrates will appreciate its effectiveness and plant safety, while those wanting an instant spray might find it a bit less convenient.

The Wet & Forget Outdoor Cleaner is a liquid decking cleaner designed for removing moss, mold, mildew, and algae stains without scrubbing or rinsing. It is applied using a hose-end nozzle that sprays up to 30 feet, making it easy to reach decks and other outdoor surfaces, especially higher or large areas. This product is bleach-free and non-acidic, which makes it safer for plants and most decking materials, though it's important to spray away from water bodies and protect nearby plants by rinsing them before and after use.

One of its main advantages is ease of use—simply spray the cleaner on a dry surface on a cool, rain-free day and let wind and rain gradually wash away stains. This means you don’t need to spend time scrubbing or pressure washing. However, the cleaning process can be slow; light green stains may clear in 1 to 2 weeks, but tougher black or long-standing stains may take several months or even up to a year. The product covers around 2,000 square feet per bottle, although very porous or heavily stained decks might absorb more.

Its gentle formula is a plus for safety and material compatibility, but those looking for quick results might find the wait time frustrating. Additionally, the need to avoid applying in rainy weather and above 55°F requires some planning. This cleaner suits homeowners who prefer a low-effort, gradual cleaning solution and can be patient about stain removal rather than needing instant results.