Di-ArdSurface biocide and wood preservative

Buy Di-Ard

What is Di-Ard?

How it works

Simply dilute Di-Ard with water and spray or wash over the affected area. No rinsing, scrubbing or power washing is required - just leave the product to work its magic. Di-Ard is bio-degradable and non bio-accumulating. When dried the surface is safe for animals, pets and children. Di-Ard is also safe to use on treated surfaces and has no staining properties.

Where to use

Di-Ard can be used on external hard surfaces. Because it contains no abrasive properties it can be used on delicate surfaces which powerwashing may damage.  Use Di-Ard to treat: roofs, walls, patios, driveways, tennis courts, car parks, greenhouses/conservatories, thatch, metal caravans and boats. Contact us and we will quickly advise you on other applications.


Di-Ard is sold as a concentrate and can be diluted to your own requirements. For example:

1 Litre of Di-Ard
1:10 dilution covers 50 sq meters
1:20 dilution covers 100 sq meters
5 Litres of Di-Ard
5:50 dilution covers 250 sq meters
5:100 dilution covers 500 sq meters
25 Litres of Di-Ard
25:250 dilution covers 1250 sq meters
25:500 dilution covers 2500 sq meters

Di-ard is cost effective and costs from as little as 16p per square meter.

Non-professional enquiries

We are pleased that the Health & Safety Executive has given permission for non-professional (general public/amateur) users to benefit from the high concentrate of Di-Ard by making it available in 1 and 5 litre bottles. Use as directed & in the correct conditions Di-Ard keeps surfaces clear of re-growth from approximately six to 12 months depending on weather and wind conditions.



At Goole Tennis Centre, we have used Di-Ard successfully over the past few years to prevent moss and algae developing on our tennis courts. Di-Ard is fast to work and ensures our courts are moss and algae free year round making the playing surfaces safe for our members.

Tim Pattle, Centre Manager

I have used DiArd in many situations from driveway and patio, wooden furniture and the coping stones on our driveway wall - in every situation it has delivered a very good job. It does more than what is says on the can. Thank you.

Iain Barker