10 Best Composite Deck Cleaners 2025 in the UK

Wet & Forget Mould, Lichen & Algae Remover is an effective solution for those looking to tackle outdoor mould and mildew issues without the need for scrubbing. It excels in cleaning power, thanks to its bleach-free formula, which permits application on a wide range of surfaces, including roofs, bricks, and natural stones. This versatility makes it suitable for various outdoor cleaning tasks, such as patios and driveways. The product's biodegradable nature aligns with environmental considerations and contributes to its appeal in 'Climate Pledge Friendly' categories.

Ease of use is one of the standout features of this cleaner. The 'spray and leave' method is hassle-free, allowing users to apply the solution and let it work without manual labor. This can be particularly beneficial for those with large cleaning areas, as the product covers between 100-300m2 when diluted appropriately.

Safety is addressed through recommendations for protective gear during application, ensuring user precautions are prioritized. However, users should be mindful of the contact time required before rain – at least 5 hours – which might limit immediate usability in unpredictable weather conditions. Regarding compatibility, the product can be applied to multiple surfaces, although it's crucial to test on a small area first to guarantee no adverse effects.

While the Wet & Forget solution may take longer to dry compared to instant cleaners, its non-scrub and expansive coverage benefits outweigh this drawback for many users. The product's effectiveness is reflected in positive customer reviews, scoring an impressive 4.4 out of 5 stars, demonstrating its reliability and user satisfaction.

The Jarder Spray & Leave cleaner stands out for its effortless application and potent cleaning power, effectively tackling green mould and algae without the need for scrubbing or pressure washing. Its super concentrate formula is a major advantage, allowing 1 bottle to produce 30 litres of solution, capable of covering 240 square meters, which is quite impressive in terms of coverage area. Users will appreciate the easy mix-and-spray method, which simplifies the cleaning process considerably.

Safety is a key strength of this product. It's biodegradable, non-caustic, and free from acids and bleach, making it safe for children and pets once dried. This aspect makes it a suitable choice for households with little ones or animals. Moreover, the cleaning solution works on a wide range of hard surfaces, from patios to UPVC windows, making it versatile for various outdoor cleaning tasks.

In terms of drying time, Jarder Spray & Leave is effective, with results showing in just 2-3 days. It also helps prevent regrowth for up to six months, which reduces the need for frequent reapplications, saving both time and effort.

However, there are a few considerations to keep in mind. The product's weight might be cumbersome for some users, especially when dealing with larger areas. Additionally, while effective in removing green mould and algae, it’s essential to note that the effectiveness and duration of the results may vary depending on environmental conditions and the severity of the mould.

The Jarder Spray & Leave cleaner is ideal for those looking for a powerful, easy-to-use solution for large surface areas, with the added benefit of safety and versatility. It's particularly useful for homeowners needing a consistent maintenance solution that minimizes effort and maximizes coverage.

The Pro-Kleen MY16 Patio Cleaner offers a powerful cleaning solution for outdoor spaces, effectively tackling green mould and algae without the need for scrubbing or pressure washing. It’s designed for use on a variety of hard surfaces, including patios, decking, fences, and more, making it a versatile option for homeowners.

The high-strength super concentrate allows a 5L bottle to create 25L of solution, covering a substantial area of 175m², which is excellent for larger spaces. Its formula includes 50% more active ingredients compared to competitors, promising better performance and longer-lasting results, up to six months of regrowth protection. This can save time and effort in maintaining clean outdoor spaces.

One of the notable strengths of Pro-Kleen MY16 is its safety profile. With a non-caustic, biodegradable formula free of acids, bleach, and harmful chemicals, it’s safe for families and pets once dry, providing peace of mind for households with children and animals. The ease of use is another highlight, as users simply mix, spray, and walk away, with visible results appearing in a few days. This convenience reduces the labor typically associated with outdoor cleaning.

However, there are some drawbacks. The product requires a garden sprayer or watering can for application, which may be an additional purchase for some users. Also, while it’s highly effective on a variety of surfaces, the drying time can vary depending on weather conditions, potentially delaying the time before the area is safe for pets and children. Pro-Kleen MY16 is a robust and safe outdoor cleaner that offers extended coverage and ease of use, making it a solid choice for those looking to maintain large outdoor areas with minimal effort.