10 Best Mildew Cleaner For A Tents 2025 in the United States

The 30 Seconds Outdoor Cleaner is a versatile product designed to quickly clean stains caused by algae, mold, mildew, and moss. Its effectiveness is noteworthy, as it works on a wide range of surfaces including wood decks, concrete, asphalt, brick, canvas awnings, and vinyl siding. This makes it a great choice for users seeking a multipurpose mildew cleaner for their tents and other outdoor areas.

Safety is a strong point with this cleaner, as it is designed not to harm lawns, trees, shrubs, or landscaping when used as directed, making it safe for use around the typical outdoor environments where tents are set up. Ease of use is another advantage, with a simple hose-end sprayer attachment that eliminates the need for pressure washing. Users just need to spray the cleaner onto the surface and rinse it off.

The 30 Seconds Outdoor Cleaner excels in effectiveness, safety, and ease of use. Users looking for products with residual protection might need to consider additional solutions.

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover is a versatile outdoor cleaner designed to effectively tackle green and black stains on a variety of surfaces including tents, roofs, wood, decks, concrete, and more. One of its major strengths is its ease of use; you simply mix it with water, spray it on, and let nature do the rest—no scrubbing or rinsing needed. This can be especially convenient for cleaning tents as it minimizes physical effort and saves time.

It is also fragrance-free, which is a plus for those sensitive to strong scents, and the product has an unlimited shelf life once mixed, offering great value for long-term use. However, the cleaner works best when used under specific conditions; it should be applied on a cool day without rain in the forecast for 4-5 hours to prevent rapid evaporation and ensure efficacy. The time it takes to see results can vary significantly—green stains may disappear in a couple of weeks, but more stubborn black stains could take several months or even up to a year to clean fully.

This slow-acting nature may be a drawback for those seeking immediate results. Additionally, while it is marketed as a multi-surface cleaner, always test a small area on your tent to ensure material compatibility and avoid any potential damage. If you’re looking for a low-effort, long-term solution to keep your tent and other surfaces mildew-free, this product is worth considering.

The 30 SECONDS Pro Mold and Mildew Stain Remover is designed to tackle tough mold and mildew stains quickly, making it a convenient choice for cleaning tents as well as many other surfaces like wood, vinyl, concrete, and drywall. One of its biggest advantages is that it requires no scrubbing, which saves effort and time—especially helpful when cleaning fabric like tent material. The formula is twice as strong as the brand’s outdoor cleaner, meaning it works fast and visibly brightens stained areas almost instantly. This can be very effective on black mold stains that often appear on tents after damp or humid conditions. It’s also ready to use straight from the bottle, which adds to its ease of use.

In terms of compatibility, it works on a wide variety of surfaces, so it should be safe for most tent fabrics, but since it is a strong formula, it's wise to test a small hidden area first to avoid any potential damage or color fading. Users should handle it with care, especially around skin and eyes, and follow any instructions on the label.

This mildew remover is a strong, easy-to-use option for tent owners who want fast, no-scrub cleaning, with a recommendation to take precautions before use on delicate fabrics.