10 Best Roof Cleaners 2026 in the United States

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover is a versatile multi-surface cleaner that attaches to your garden hose with a new and improved nozzle for ease of use. The jet tip can spray up to 30 feet, making it ideal for reaching high areas like roofs, while the fan tip allows quick application on larger surfaces such as driveways and decks. One significant advantage is that it doesn't require rinsing and works over time with the wind and rain, cleaning green stains in 1-2 weeks and more stubborn black stains over several months.

Another strong point is its long-lasting effect, keeping surfaces clean for up to a year or longer. It is bleach-free and non-acidic, making it safer for the environment and nearby plants, although it's recommended to spray 100 feet away from water bodies and flush plants before and after application. Each 48-ounce bottle treats up to 2,000 square feet and has an unlimited shelf life, which is beneficial for long-term use.

However, it may take several months to fully clean heavily stained areas, which could be seen as a drawback for those looking for immediate results. Additionally, it requires careful application on a cool, dry day with no rain forecasted within 4-5 hours, which might be inconvenient for some users. Wet & Forget Outdoor is highly effective and convenient for those needing a long-lasting roof cleaner that also works well on various other surfaces.

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover is a liquid concentrate designed to clean outdoor surfaces including roofs, siding, decks, and concrete. It works without scrubbing, rinsing, or pressure washing—simply mix with water, spray on a dry surface, and let nature handle the rest. This makes it very user-friendly, especially for those who want an easy application. The product is fragrance-free and safe for a variety of materials.

It requires specific weather conditions for best results—apply on cool, dry days without rain expected soon to avoid washing away the solution prematurely. Stain removal starts within 1-2 weeks for lighter moss or algae but can take several months for stubborn or black stains; some deep-set stains may need up to a year to disappear fully. The product can keep surfaces cleaner for a year or more, reducing maintenance frequency. It’s a good choice if you prefer a gentle, hands-off approach and don't need instant results.

Since the formula works gradually with rain and wind, its effectiveness depends on local weather patterns. This product is well-suited for homeowners looking for a low-effort, multi-surface outdoor cleaner that’s mild yet reliable over time.

The 303 Products Rubber Roof Cleaner is a liquid cleaner specifically designed for rubber roofs on RVs, campers, pop-ups, and motorhomes. Its formula effectively removes heavy dirt and buildup without damaging sensitive surfaces like solar panels, siding, or rubber seals, which makes it safe and environmentally friendly. The cleaner is biodegradable and unscented, a good choice if you want to avoid harsh chemicals or strong smells.

You apply it by diluting 5 ounces in 5 gallons of water, then pouring and scrubbing the roof before rinsing it clean with a hose. This method covers a large area since one gallon can treat substantial roof space, ideal for bigger vehicles. After cleaning, the roof is left residue-free, making it ready for further protection with products like the 303 Aerospace Protectant, which helps shield against dirt and UV rays, extending the cleanliness duration.

The product requires manual scrubbing to fully remove buildup, which may take some effort depending on how dirty your roof is. Also, while it’s great for rubber roofs, it’s not formulated for other roof materials. If you want a reliable, safe cleaner that preserves your RV’s rubber roof and materials around it, this product fits well, especially before applying protective coatings.