10 Best Moss Killer For Roofs 2025 in the United States

The 30 Seconds Outdoor Cleaner is designed to tackle moss, algae, mold, and mildew stains on a variety of outdoor surfaces including wood decks, concrete sidewalks, vinyl siding, and more. It comes with three 64-ounce bottles and a hose-end spray attachment, making it straightforward to use. Simply attach the sprayer to the bottle, spray the solution on the stained surface, and rinse off with water – no pressure washing is required.

This product covers up to 900 square feet, which is a decent range for most home cleaning tasks. One of its key strengths is its safety; when used as directed, it won't harm your lawn, trees, or other plants, making it environmentally friendly. However, it's important to follow safety precautions as with any chemical cleaner.

This cleaner is particularly suited for homeowners looking for a quick and easy solution to clean outdoor moss and algae stains without the need for harsh pressure washing.

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover is a solid choice for homeowners dealing with unsightly moss and algae on roofs and other outdoor surfaces. Its standout feature is the Xtreme Reach Hose End nozzle, which can spray up to 30 feet, making it easy to target hard-to-reach areas without much hassle. This product is designed to be safe and user-friendly, as it is bleach-free and non-acidic, reducing the risk of harming nearby plants or water sources when used correctly.

One of the strengths of this moss killer is its long-lasting effectiveness. Once applied, the cleaner works with rain and wind to gradually eliminate stains over time. Users can expect to see results on green stains within a couple of weeks, while tougher black stains may take longer to disappear—sometimes up to six months. This slow-acting nature can be a benefit for those who prefer a no-fuss solution, as there’s no need to rinse the product away after application. However, the product requires specific weather conditions for optimal application—ideally on dry, cool days with no rain forecasted for several hours. Additionally, while it can cover a substantial area of up to 2,000 square feet, heavily stained or porous surfaces may absorb more product, potentially leading to needing more than one bottle for complete treatment.

The Scotts MossEx Easy-To-Use Shaker Jug is a practical solution for those looking to eliminate moss from their lawns while also promoting grass growth. Its granule form is easy to apply, especially in smaller spaces or for spot treatments, making it suitable for homeowners with limited areas to treat. The shaker jug design simplifies the application process, allowing for a hassle-free experience.

With a coverage area of up to 4,000 square feet, it can efficiently handle medium-sized lawns, making it versatile for various property sizes. This product is designed for use on all grass types and should be applied during winter or spring when moss is actively growing, ensuring optimal effectiveness. The inclusion of nutrients to green your lawn is a nice bonus, contributing to healthier grass.

It is essential to note that the product is best used on lawns and may not be ideal for other surfaces like roofs. Additionally, international buyers should be aware that terms and instructions may vary. Safety precautions should always be followed as with any chemical product. Scotts MossEx is a user-friendly and efficient choice for tackling moss in lawns, especially for those seeking an easy application method.