Blackened window sills and capping stones - do you know how to soft wash them?

November 18, 2021

Benz Tornado Cleanze & Benz Lightning Cleanze - for cleaning window sills and capping stones colonised by algae

Soft washing heavily blackened stone and concrete window sills and wall capping stones can be challenging. Usually the black is caused by a colonisation of black algae.

In our experience your best bet is to treat them with Benz Tornado Cleanze.

This is just the type of job we created it for. Simply apply neat with a brush, or, if the colonisation is only mild, possibly dilute up to 50%. Activation time needed will depend on the severity of the colonisation.

Quick tip: If you don't have some Tornado Cleanze handy, spray and brush-in Lightning Cleanze at 4:1. Allow plenty of time for activation – 30-60 minutes – and consider multiple treatments.

Whichever treatment you choose, rinse well and remember to protect any plants or lawn that could come into contact with the rinse water.

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

Ben, Leo, Fiona, Stevie & Anthony

PS: The above advice assumes the black algae and not carbon, which requires specialist treatment. 


Click here to explore the full range of Benz softwash cleaning products

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

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