Moss and Lichen Remover 1L, Chemia — liquid biocide for outdoor surfaces

Chemia Moss and Lichen Remover 1L is a concentrated liquid biocide formulated for removing moss, lichens and similar biological growths from outdoor hard surfaces. The product is intended for use on roofs, patios, paving, natural stone and wooden decking to clean contaminated areas and reduce the likelihood of rapid regrowth when applied according to the manufacturer's instructions. It is supplied as a ready-to-dilute or ready-to-use liquid and is intended for professional and DIY garden maintenance tasks requiring surface restoration prior to repair, sealing or painting.

Advantages

The formulation offers effective contact action against moss and lichen, helping to loosen and remove growths without aggressive mechanical treatment where surfaces allow. It is suitable for a wide range of outdoor materials including masonry, concrete, stone and timber, and can be applied with standard spraying or brushing tools. The 1-litre format provides a compact option for small to medium jobs or trialing treatment on limited areas. When used as directed, the product contributes to longer intervals between intensive cleanings by inhibiting re-establishment of biological growth.

Suitable for

• Roofs with non-sensitive coverings
• Patios, terraces and paved paths
• Natural stone and concrete surfaces
• Wooden decking and garden timber
• Surface preparation before repairs, sealing or painting

Key specifications

• Form: liquid biocide suitable for outdoor use
• Volume: 1 litre
• Application methods: low-pressure sprayer, pump sprayer, watering can with rose or brush application
• Material compatibility: masonry, concrete, natural stone, ceramic pavers, treated timber (test on a small area first)
• Working temperature: apply in dry conditions, typically above 5°C to ensure efficacy

How to use

Ensure the surface is clear of loose debris before application. Apply the product evenly across the affected area using a suitable sprayer or brush, following dilution guidance printed on the product label if dilution is required. Allow the solution to act for the time recommended on the label to penetrate and weaken moss and lichen structures, then rinse or remove residues according to instructions. Avoid runoff into drains or watercourses and do not apply during rain or when rain is forecast within the specified action time. Wear appropriate personal protective equipment including gloves and eye protection while handling the biocide.

Usage recommendations

Test on a small inconspicuous area prior to full application to confirm material compatibility and desired effect. For optimal long-term results, combine surface treatment with repair of damaged joints, improved drainage and periodic maintenance to reduce moisture retention.