How long can I store diluted Bio Cleanze (softwash biocide)?

December 01, 2023 2 Comments

How long can I store diluted Benz Bio Cleanze (softwash ddac biocide)?

Undiluted and unopened, the shelf life of Benz Bio Cleanze is at least 2 years.

If you know you are going to be left with some soft washing biocide, the best water to use for diluting is purified water (as used for window cleaning with water fed poles, aka de-ionised water).

This will not affect active ingredient in Bio Cleanze – DDAC (Didecyldimethylammonium Chloride).

Other than this, it's impossible to give a definite answer because the chemical make-up of water varies from area to area. Therefore we cannot know the mineral content of the water that any given contractor would use.

That said, we've stored 25 litres of Bio Cleanze diluted with tap water for a couple of weeks and it has worked fine.

On a hot day the speed of degradation may increase. And it's always best not to store chemicals in hot vans or sheds. Cold temperatures have not shown to have negative impact on the quality of the product thus making Winter storage a breeze.

Our best advice is simply to prepare the quantity of Benz Bio Cleanze you know you will use – which you will get better at judging with experience – and price in some wastage. 

Quick tip: Download our Product Documentation Pack to get detailed application and dilution info, plus much more. Click the link further down this page to download in seconds.

By pricing in a small amount of wastage you can ensure you will not be out of pocket, even if there is some left over.

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

The Benz Team

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

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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

2 Responses

Leo Searle Hawkins
Leo Searle Hawkins

September 28, 2021

Hi Simon,

It will not do any harm and will probably be strong enough to be effective, although obviously it’s impossible to know exactly what strength it will be now.

You will find answers to all your questions by reading:

The Bio Cleanze product page:

The technical information page:

The application guide (in our Product Documentation Pack):

Our Trade Tips post on soft washing tarmac:

This webpage on protecting children & animals:



Simon Long
Simon Long

September 28, 2021

I have a half OPENED bottle of biocleanse I got from Rutland pumps It has been stored in a dark container in my van for approx 6 months. can i still use it ?

I have a moss covered tarmac drive i am pressure washing next week is the biocide pet friendly when dry
What should the dilution rate to water be with tarmac?
Can I apply the biocide straight after cleaning the tarmac with my pressure washer or should I leave it for a period first ?

Kind Regards


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