How to quickly & easily remove rust stains from render with Benz Oxy Cleanze

October 30, 2017

Click here to learn about Benz Oxy Cleanze oxidation (rust) and limescale remover

Using Oxy Cleanze rust removal gel on wall render*

Rust stains on renders can be caused by flue pipes, satellite dishes, mild steel fixings, overflow pipes, etc. And they can cause an otherwise sound property to look unsightly.

* Our tests showed positive results on all the renders we’ve tried it on except cement based render. (i.e. sand and and cement, which should be painted anyway – and in which case it too will be fine).

Quick tip: Because there are so many types of render, with varying constituents, and formulas are constantly changing, it is impossible for us to test them all. So, with your customer's permission, always test a small, out of the way area of any surface you are considering treating with any of our products – and obtain your customer's agreement that the result is acceptable to them – before treating the entire area.

 

In the picture below you can see rust stains caused by fittings on a flue.

Remove rust stains from render with Benz OxyCleanse Rust Removal Gel

We brushed Oxy Cleanze on and left it to work. Temperature was 15 ℃

OxyCleanze removes rust stains from render

 

Notice the difference in the photo below after only 3 hours (it would have been much quicker in warmer conditions).

Clean rust from render with OxyCleanze rust removal gel

You can see that, although dramatically improved, there are still some faint marks, which will likely become less pronounced over time. You can see the shadow left behind as a result of the treatment, which is a side effect on some renders. A repeat application of our rust remover gel could be beneficial.

Quick tip: The key to successfully removing rust stains from renders is to apply Oxy Cleanze rust removal gel only to the specific areas that need treating. On some renders and masonry there may be an undesirable bleaching effect. Always treat a small, inconspicuous test patch, and get your customer's agreement to treat the whole area, before completing the contract.

 

In the photo below you can see the stains caused by rust from a hanging basket bracket.

Rust stain on render caused by hanging basket

We treated the rust with Oxy Cleanze rust remover gel and and successfully removed the staining.

Rust stain on render treated with Benz OxyCleanse rust remover gel

However, notice the shadow left behind, which is the side effect of over-using Oxy Cleanze on this type of render. This photo shows the importance of applying rust remover gel only to the areas that need treating.

The photo below shows a similar bracket where we used a smaller quantity of Oxy Cleanze and the results, as you can see, were much improved.

Clean rust from render caused by hanging basket bracket


We hope this information is helpful.

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

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