N-Virol Algae and Moss Killer

N-virol Algae and Moss Killer works on contact and typically kills mould and other growths within 2-4 days. Its secondary detergent action then goes on cleaning the treated surface gently over the following weeks and months.

Where to use it

N-virol Algae and Moss Killer is suitable for a wide range of surfaces, including:

• Gravestones
• Brick, stone
• Plaster, masonry
• Concrete paths
• Patios, tarmac paths
• Monuments
• Tennis courts
• Play areas
• Tiled roofs
• Fibreglass
• Greenhouse glass
• Decking areas

Special properties

• High coverage rate
• Suitable for indoor and external use
• Wood preservative and surface biocide
• 5 litres will make a maximum of 100 litres of fluid
• No bleach or acids, biodegradable
• Listed by Natural England as suitable for use in bat roosts

Preparation

Where there is a severe build-up of moss, remove as much as possible by physical means, or break up the surface, before treatment. Some mosses and lichens resist treatment because of their impervious surface. Abrading the growth first, for example with a stiff brush, improves the effect of the solution.

Application

Read the product label before use.

Apply the diluted solution with a low pressure pneumatic sprayer for a coarse spray, or with a watering can fitted with a rose attachment. For small items such as gravestones, it can be applied by brush, provided the solution is flooded generously into inscriptions and other cavities. Always direct the spray away from the body and never spray directly overhead.

For the best result, apply N-virol Algae and Moss Killer when surfaces are reasonably dry and rain is not imminent, and work in wind free conditions to minimise spray drift. Once the initial application has killed the existing growth (2-7 days), the treated surface will not need washing. In cases of severe contamination, remove the dead material by brushing, washing or power spray, and a second coat may be necessary. Retreatment may be needed to prevent regrowth. Treatment life can be shortened by:

1. Dense substrates that do not absorb the fluid
2. Surfaces where dirt or leaves are allowed to accumulate
3. Persistently damp areas

Internal treatments (mould control)

For interior work, remove traces of mould and algae by normal cleaning methods first, then apply N-virol Algae and Moss Killer. On relatively non-porous surfaces such as painted plaster or ceramic tiles, the application rate can be reduced and the solution applied with a fine mist spray. Mould colonies can damage underlying substrates such as paint and wallpaper, so remove any damaged decoration before treatment or before applying new coatings.

Finishing

Once the surface is dry, the decorative finish can be applied. Treated timber, such as decking, can be overcoated when dry with a range of decorative or protective paints. With some water based coatings, check a small area first to confirm compatibility.

Product data

• Appearance: clear liquid at room temperature
• Pack size: 1.0, 5.0 and 25.0 litres
• Coverage: brush or spray application, 1 litre of dilute solution per 5m² of surface

Storage

Store the concentrate and any diluted solution in frost-free conditions, away from direct sunlight, heat sources and foodstuffs.

Cleaning

Clean and rinse all equipment thoroughly with water after use. Rinsings can be reused for subsequent dilutions if free of contamination, and stored as above.

Shelf life

Concentrate: 12 months in sealed containers.

Safety

Certain statutory precautions apply to this product under the Control of Pesticides Regulations. Read the label before use. More detailed information for hazard assessment and emergency procedures is available in the N-virol material safety data sheets.

Pack coverage: high dose, 5L pack treats 125m². Low dose, 5L pack treats 250m².