10 Best Headstone Cleaner 2025 in the United States

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover is designed as a gentle yet effective outdoor cleaner that works on various surfaces including wood, concrete, vinyl, and metal. While it’s not specifically marketed for headstones, its ability to remove moss, mold, and algae without scrubbing or rinsing makes it a convenient option for cleaning stone monuments. Because it works gradually with rain and wind, green stains often clear within a couple of weeks, but tougher black or older stains can take several months to fade, which might require some patience.

Its formula is unscented and fragrance-free, which is good for users sensitive to strong smells, and it does not require harsh chemicals or power washing, reducing the risk of damage to delicate stone. Users mix it with water and spray on a dry surface, then leave it alone, offering ease of use and low physical effort. Since it requires multiple applications over time for deep stains, it’s less suited for someone needing immediate results.

This product provides a user-friendly, low-maintenance option suitable for gently removing outdoor biological stains from a variety of surfaces, including headstones, though its slow action might be a downside for some.

The Therapy Granite Cleaner Kit is designed primarily for natural stone surfaces like granite, marble, quartz, and slate, making it a suitable option for cleaning headstones made from similar materials. Its plant-based, neutral pH formula ensures it is gentle and safe for both users and stone, reducing the risk of damage during regular cleaning.

The kit includes a microfiber cloth that helps achieve a streak-free, glossy finish, enhancing the stone's appearance without leaving residue. It effectively removes grease, oil, and grime, which supports daily maintenance of headstones exposed to outdoor elements. The product is tailored toward indoor stone surfaces like countertops but can also support gentle, everyday upkeep of headstones made from common stones like granite or marble.

This cleaner offers ease of use and a polished look, though it may not fully replace specialized outdoor or heavy-duty stone cleaners for tougher stains such as moss or lichen on headstones.

The Patio Black Spot Remover is designed to be a comprehensive solution for cleaning various types of stone surfaces, including headstones. One of its key strengths is its compatibility with all stone types, meaning you don't have to worry about damaging the surface while cleaning. Its effectiveness against stubborn stains like black lichen, green algae, and white fungi makes it an excellent choice for restoring the natural color of headstones, which can often become discolored over time.

The product is biodegradable and acid-free, making it safe for use around garden areas without harming plants or lawns, which is a significant advantage. Additionally, the liquid formula is easy to apply and spreads over a good coverage area of 5 square meters per liter, so a 4-liter container should last for multiple cleaning sessions.

While the product is highly effective, users may need to apply it more than once for deeply entrenched stains. Also, the product's larger dimensions might make it less convenient to store if space is limited. Despite this, the Patio Black Spot Remover is a trusted and reliable option for anyone looking to maintain the cleanliness and appearance of stone surfaces, including headstones, without causing harm to the environment or surrounding flora.