Wet & Forget Mould, Lichen & Algae Remover Review: Easy, bleach-free outdoor cleaning

⚡ At a Glance

• • Cleaning Performance: Concentrated spray solution treats black spot, mould and algae with no scrubbing.
• • Best for: Homeowners and gardeners who want low-effort maintenance across large outdoor areas
• • Not ideal for: Situations that require instant visual results, since results develop after application

Concentrated formula dilutes 1:5 and is applied by spraying across affected areas. Nearly pH-neutral and bleach-free, the solution covers large areas and needs protective gloves and eye protection during use.

Effort-free Surface Cleaning - with a concentrated 1:5 dilution

Mix one part product with five parts water to create a ready-to-spray solution; apply and leave to act without scrubbing, rinsing or jet washing. Application performs best in cloudy, dry conditions and requires several hours before rain.

Huge time saving for regular upkeep, allowing treated areas to clear up without manual scrubbing. A single prepared volume treats broad runs of patio or roof where frequent cleaning would otherwise be required.

Safe on Many Materials - thanks to a nearly pH-neutral, bleach-free formula

The formulation is described as gentle and almost pH-neutral, avoiding bleach-based chemistry. Manufacturer guidance lists compatibility with patios, roofs, bricks, paving, artificial grass, tarmac, decking, headstones and solar panels.

Suitable for varied outdoor surfaces without relying on harsh bleach, so a wider range of areas can be treated using the same solution. Useful when working across mixed materials in a garden or driveway.

Wide Coverage from One Bottle - with a highly concentrated formula

One bottle produces up to 30 litres of solution, with stated coverage of roughly 100–300m² depending on surface and application. Apply in cloudy, dry conditions and ensure at least four to five hours before any rainfall.

Fewer refills are needed for whole-driveway or patio jobs, making it practical for larger properties. Planning around the weather window yields the best, longest-lasting results.

✨ The 4 Key Reasons for Wet & Forget Mould, Lichen & Algae Remover

1. Produces up to 30 litres of solution - Covers 100–300m² per bottle, suitable for large areas
2. No scrubbing, rinsing or jet washing required - Let the solution work unattended for low-effort cleaning
3. Bleach-free, nearly pH-neutral formula - Gentle on surfaces while tackling mould and algae effectively
4. Suitable for many outdoor surfaces - Safe for patios, roofs, decking, tarmac, artificial grass and solar panels

📋 Technical Details at a Glance

• Category: Lawn & Patio
• Volume: 5L bottle
• Dilution: 1 part product to 5 parts water
• Solution yield: Produces up to 30 litres of ready-to-spray solution
• Coverage: Approximately 100–300m² depending on surface and application

❓ Frequently Asked Questions

🏆 Our Verdict

Ideal for homeowners and gardeners who need low-effort, wide-area outdoor cleaning. The concentrated, bleach-free formula removes mould, lichen and algae without scrubbing and produces a large volume of ready-to-use solution. Expect long-term maintenance benefits from reduced manual labour and fewer repeat treatments.