Wet & Forget Moss, Mold, Mildew & Algae Stain Remover – Outdoor Cleaner 64 oz

Overview

Wet & Forget Moss, Mold, Mildew & Algae Stain Remover is an outdoor cleaner designed to tackle stubborn stains without scrubbing or power washing. This 64-ounce concentrate is diluted 1 part product to 5 parts water and applied with a garden sprayer. When exposed to wind and rain, the cleaner slowly loosens and lifts organic staining from hard, non-porous surfaces.

The process is gradual and patience-friendly: green stains often begin to fade within days to a couple of weeks, while black or long-standing stains can require several weeks to months. With continued use, surfaces stay cleaner for a year or longer, and reapplication at the first sign of reoccurrence helps maintain the improvement.

Key benefits at a glance

• No scrubbing or rinsing required on suitable surfaces
• Bleach-free and non-acidic formulation
• Works with wind and rain to continue cleaning over time
• Long-lasting results with maintenance opportunities to keep surfaces looking fresh

How to use

• Mix 1 part Wet & Forget with 5 parts water in a pump sprayer.
• Apply to a dry, debris-free surface, generously covering the area.
• Do not rinse; avoid applications if rain is expected within 4–5 hours after spraying.
• Reapply at first sign of reoccurrence; store unused solution in the sprayer for future use.

Surface compatibility and coverage

The cleaner is suitable for many hard, non-porous outdoor surfaces, including decks, siding, roofs, walkways, patios, sealed brick, sealed concrete, vinyl, wood, canvas, aluminum, and even some outdoor upholstery. A little goes a long way: one bottle treats roughly 375 to 1,125 square feet, depending on stain severity and surface porosity. Heavy stains or porous surfaces may absorb more product.

Real-life use cases

Imagine a shaded deck brightening after a rainstorm, or a roof line gradually lightening as algae fades. This cleaner offers a practical approach to improving curb appeal without aggressive cleaning methods. With regular maintenance, you can extend the crisp look of outdoor spaces over time.

Safety and environmental notes

Because Wet & Forget is bleach-free and non-acidic, keep it away from ponds and waterways and follow local guidelines. Spray 100 feet away from lakes, ponds, rivers, and streams, and flush nearby plants with water before and after application. Store any unused solution in the sprayer for later use.

Results can vary based on stain age, surface porosity, and weather conditions. Patience can pay off with a more even, longer-lasting clean.