10 Best Deck Cleaners

Wet & Forget Mould, Lichen & Algae Remover is a liquid outdoor cleaner designed to remove black mould and algae without the need for scrubbing or rinsing. You simply mix 1 part of the solution with 5 parts water, spray it on your deck or other outdoor surfaces, and let nature do the rest. This makes it very easy to use, especially for those who want to avoid heavy labor. It works on a wide range of outdoor materials including decking, brick, patios, artificial grass, and even solar panels, making it quite versatile.

The cleaner is bleach-free and nearly pH-neutral, which means it’s gentle on surfaces and less likely to cause damage compared to harsher chemical cleaners. It is also biodegradable, which is a plus if you are concerned about environmental impact. However, despite its gentle nature, wearing gloves and eye protection is recommended during application, indicating some caution is still needed.

The product’s cleaning action continues over time as wind and rain help break down mould and algae, offering longer-lasting results. Because it relies on weather to work, it may take longer to see visible results compared to stronger, faster-acting cleaners. This product is well suited for those who want a low-effort, environmentally friendly solution for keeping their deck and other outdoor surfaces mold-free, but users should be patient to see full results.

The Cuprinol CUPDONO25L Uv Guard Decking Oil is a reliable option for those looking to maintain and protect wooden decks. Its primary strength lies in its ability to nourish the wood and provide protection against weathering, making it particularly suitable for environments with varied climatic conditions. The formula is lightly tinted, offering a natural oak finish, which can enhance the beauty of wood surfaces while aiding in UV resistance.

Application is flexible, as it can be done with a brush or a Cuprinol sprayer, depending on user preference. With up to 8 square meters of coverage per liter when applied with two coats, it offers decent coverage. However, it's important to note that drying can take up to six hours, which may require planning around weather conditions and time availability.

It's specifically designed for wooden surfaces, making it an excellent choice for those who have wooden decks. However, the product is less versatile when it comes to compatibility with other deck materials, so users with composite or metal decks might need to look elsewhere. With a high customer rating of 4.5 stars from 13,942 reviews, it seems to meet the expectations of most users.

For wooden deck owners seeking a product to maintain a natural aesthetic and provide protection, this decking oil is a solid choice, though its limitations with other materials and slower drying time should be considered.

Wet & Forget Mould, Lichen & Algae Remover is a 2-liter outdoor cleaner formulated to address mould, algae, and black spots on various surfaces including decks. It is used by diluting one part cleaner with five parts water and spraying it on the affected area, requiring no scrubbing or rinsing for ease of application.

Its nearly pH-neutral, bleach-free formula is gentle enough for many deck materials such as wood, composite, and other outdoor surfaces, minimizing the risk of damage that harsher cleaners or power washing might cause. The product relies on natural rain and wind to continue the cleaning process over time, providing prolonged protection against grime return. It is biodegradable and environmentally friendly, suitable for outdoor use.

Despite its gentle formulation, wearing gloves and eye protection is recommended during application. The cleaning process occurs gradually rather than instantly, making this product better suited for users seeking a low-effort, maintenance-friendly cleaner instead of an immediate heavy-duty solution.