How to calculate the coverage of Benz Softwash biocides (video)

June 01, 2023

How to calculate the coverage of Benz softwash biocides (video)

We get asked this question a lot: "How do you calculate the coverage of Benz Biocides so you know exactly the quantity to buy for a given soft washing contract?"

Watch the video below for a simple explanation:


We put the following examples together to help you order the optimum amount of soft washing biocide best suited to the contracts you have and expect to gain.

How to calculate the coverage of Benz Bio Cleanze biocide

1 Litre of undiluted Bio Cleanze makes 40 litres of mix for winter work (40:1) and 50 litres in the summer (50:1).

1 Litre of mix will cover approx 4 square metres. Therefore you can expect 40-50 litres of mix to cover 160 - 200 square metres.

5 litres of Bio Cleanze will clean, roughly:

• Five average driveways and paths around a house

• Or, three large gable ends

• Or, the walls of one large house

• Or, one average roof

Click here to download our free  Benz Softwash Documentation Pack (includes application guides)

How to calculate the coverage of Benz Lightning Cleanze biocide

30-40 litres will be used by a one-person contractor per day and will treat the elevations of a large detached house, including paths and drive. Small jobs may require as little as 5 litres while large contracts can use up to 100 litres per day.

As a rough guide, 5 litres of undiluted Lightning Cleanze will make 30 litres of mix at 5:1 dilution, which will treat 40-50 square metres of a porous surface and 80-100 square metres at 10:1 dilution of a non-porous surface.

The exact coverage of LIghtning Cleanze depends on:

• The porosity of the surface (think "honeycomb")

• The type and amount of organic material present

• The method of application, ie spray, brush, or watering can.

10 litres of undiluted Lightning Cleanze will make 60 litres of mix at 5:1, which will clean

  • a large gable end.
  • Or, an average 2-car Cobblelock driveway.

10 litres of undiluted Lightning Cleanze will make 110 litres of mix at 10:1.

On smooth surfaces, such as steel cladding, or painted surfaces this will clean roughly 300 square metres.

Click here to download our free Benz Softwash Documentation Pack (includes application guides)

We hope this information is helpful and sincerely wish you great success in your soft washing business,

Benz Team

Click here to get more practical soft washing how-to tips

How to find answers to most soft washing questions: Simply enter a relevant "keyword" or short phrase – e.g. keyword for the above link = "how to" – into our in-site Search Engine (magnifying glass icon on the main menu).

Click here to download our Product Documentation Pack (includes Application & Dilution guides, SDS, PDS, RAMS, PPE & Mask info, COSSH, sample Contract and more)

Order Benz Softwash chemicals & equipment online or by phone:

GB (England, Scotland, Wales)

Phone: 0800 70 74 222 


Ireland and other countries

Phone: 00353 214 622 978


Lines open Monday - Friday, 9am – 5pm

Please note: The above numbers are for orders only (click here for tech support)

PS: Click here to set up your "Clean & Maintain" programme
. After completing an initial soft wash treatment, put your customer on a "Clean & Maintain" ongoing maintenance programme. Your customers will enjoy a permanently clean property and you will enjoy a steady stream of repeat business.

This is clearly a win-win arrangement for you and your customers.


Click here to explore the extensive range of Benz softwash cleaning chemicals & equipment

Benz Softwash Bio Cleanze DDAC biocide & Benz Softwash Lightning Cleanze SH sodium hypochlorite biocide

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