How can you prevent marks remaining on render after softwashing? (video how-to)

September 07, 2016

Benz Softwash supply softwash chemicals to the professional softwash cleaning trade

A customer told us he’d treated KRend with Benz Lightning Cleanze but some marks remained. He wanted to know why this could be and what we suggested he did.

We suggested:

If it was a very hot day when the KRend render was treated with Lightning Cleanze, it may have "boiled off" soon after application.

This, combined with the porous nature of KRend, and all wall renders, may have meant that the chemical didn’t stay on the surface long enough to do it's job.

1) Lightly pre-wetting the surface (a garden hosepipe is fine) prior to application in hot conditions. This will cool the surface and mean that the likelihood of Lightning Cleanze boiling off is significantly reduced.

It's important that the surface remain wetted by Lightning Cleanze for at least 30 minutes, and ideally 60 minutes, following application. This allows the chemical time to work.

2) Ensure your Lightning Cleanze mix is 5:1

3) Avoid applying in very hot sun. Work either earlier or later in the day if necessary.

4) Ensure you brush Lightning Cleanze gently but firmly into the surface. This will ensure it gets deep into the biological growths that cause the "dirty" appearance.

No abrasive or aggressive scrubbing though. This is because wall render is quite a delicate building material and can be damaged by overly aggressive scrubbing.

5) Finally, rinse thoroughly.

6) For a perfect job, complete with a spray of Benz Bio Cleanze at 50:1 (40:1 in winter).

This will provide long-term biocide protection against re-colonisation. Bio Cleanze will also continue to clean the render for several months following application.

 

Click below to watch the video

 

We hope this information is helpful and inspires you to succeed in softwashing.

Cheers,

Ben, Leo
 & Fiona

Click Here to explore the full range of Benz popular softwash cleaning products

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

Leave a comment

Comments will be approved before showing up.


Also in Benz Trade Tips

Ben demonstrates the best softwashing equipment for treating roofs
Ben demonstrates the best softwashing equipment for treating roofs

June 03, 2021

Watch Ben demonstrate the soft washing equipment he uses for applying softwash chemicals when treating a roof. No matter how you dilute or pump your softwash chemicals you need a safe and efficient way to apply the chemicals to a roof.

View full article →

How to rinse dry dash (pebble dash) render after soft washing with Benz Lightning Cleanze
What's the most effective way to rinse dry dash (pebble dash) render after soft washing?

May 29, 2021

Several customers asked us what, in our experience, is the safest and most effective way to rinse dry dash (pebble dash) wall render after soft washing?

In this video Ben demonstrates the fan jet nozzle we use for rinsing dry dash render after applying Benz Lightning Cleanze.

View full article →

Oxy Cleanze gel - rust, rust stains, and limescale remover
How to rinse Benz Oxy Cleanze safely and effectively

May 20, 2021

We've been asked about the safest and most efficient and effective way to rinse Oxy Cleanze – and all softwash products – from treated surfaces. The concern was to minimise any possible impact on surfaces not being treated but that could receive run-off.

View full article →