How to remove sodium hypochlorite oxidation stains from lead

September 15, 2023

How-to tips for using Benz Oxy Cleanze to remove oxidation from lead

A customer asked us: "I put Benz Oxy Cleanze on a client's lead flashing. It's come up very bright and from a distance looks white. Is that normal?"

We replied that Benz Oxy Cleanze:

  • reverses the effects of yellow and brown sodium hypochlorite (sh, hypo) oxidation on lead
  • removes rust stains from render
  • kills rust on steel fittings
  • kills rust on cast iron downpipes
  • and removes limescale build up from window glass.

How long does it take Oxy Cleanze to remove staining from lead?

Sodium hypochlorite stains on lead are best treated with Oxy Cleanze asap after the staining has occurred.

Oxy Cleanze should not be left on lead longer than advised on the label. Whitening can be the result of it being left on lead flashing for too long.

To reverse the whitening of lead we suggest giving the lead flashing a light rub with Scotch-Brite, or the mildly abrasive pads sold for pot and pan cleaning.

Health & Safety: Always wear appropriate PPE to protect yourself from inhaling lead dust, or absorbing it through your skin.

How to bring back the original colour of lead

An Oxy Cleanze treatment can be followed up with an application of "patination oil" which can be bought from most builders merchants.

This treatment will bring back the dull grey colour of lead that your customers are used to seeing, and will also help protect the lead from further staining.

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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