October 24, 2017
After softwashing a surface such as a roof, which has a lot of lead flashing, with a sodium hypochlorite product (eg Benz Lightning Cleanze) the sodium hypochlorite may react with the lead and discolour it.
Rinsing prior to softwashing with any sodium hypochlorite product, rinsing during softwashing, and then a final rinse when the softwash treatment is complete, will go a long way to protect the lead.
Of course sometimes rinsing alone just isn't enough.
That's where Benz Oxy Cleanze oxidation removal gel comes in ...
New lead has a whitish/blueish appearance that "dulls down" to the grey colour we are familiar with, eg. the lead flashing on roofs.
Oxy Cleanze will quickly remove oxidation stains on lead flashing caused by natural oxidation and softwashing with sodium hypochlorite.
Quick tip: Modern lead may not be pure and so can discolour over time. Benz Oxy Cleanze will not reverse this form of reaction.
We coated the lead in the photo below with neat Lightning Cleanze and left it for 60 minutes. Then we rinsed and dried it. The temperature was 6 ℃.
In the photo below we applied Oxy Cleanze rust remover by brush and left it to work.
The photo below shows the results after only 30 minutes.
Two hours later we rinsed the Oxy Cleanze gel from the lead.
The results we achieved would be satisfactory for most lead restoration work, e.g. after lead has been cleaned with a sodium hypochlorite based product.
Apply a second coat if needed. In the photo below the far right section was treated a second time. We left this overnight (it was winter and cold – we do not recommended leaving a treated surface overnight during the warmer summer months) and rinsed the oxidation removal gel from the lead.
The photo below shows what it looked like when dry. Notice that the lead looks brighter and more blue/white than the dull grey we are used to seeing on lead flashing. It will gradually "dull down" with age (btw: the change of background colour was due to poor lighting conditions).
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On the property below, one application of Oxy Cleanze was enough to remove the yellow staining caused by softwashing with sodium hypochlorite, along with some ingrained oxidation.
After four hours at 5 ℃ we thoroughly rinsed Oxy Cleanze rust removal gel off the lead flashing with water using a garden hose and some light brushing. The photo below shows the result:
Quick tip: The ingrained oxidation, which had built up over many years, cannot be removed without the repeated use of Oxy Cleanze rust remover, which could cause whitening of the lead .
This may be undesirable in some situations and for some customers. So always inform your customer of the possible results of repeated applications of Oxy Cleanze and allow your customer to make the decision as to whether to go ahead.
Natural weathering will reverse the whitening you can see in the above photo as the lead flashing tarnishes and dulls down.
We hope this information is helpful.
Ben, Leo & Fiona
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July 21, 2021
We use pencil jets in our brushes because we've found they don't clog or break as much as fan jets.
In the case of the Gardiner 45cm brush we use four of them. We turn the pump down so the flow rate is acceptable and does not produce much run-off.
Flow control at the pole is still critical however. Click the link on this page to learn about the solution we've found to be so successful ...
July 15, 2021
July 10, 2021
Some customers have wondered why we add IPA (Isopropyl Alcohol) to Benz Bio Cleanze. So we thought we'd clear this up and clarify the situation once and for all.
Click the link on this page to read the full Trade Tips post ...
It's a free resource for people wanting to learn about the soft washing industry, to expand an existing business, or build a new business.
Soft washing reduces, or even eliminates, the need to use high-pressure washing.
Instead, once the build up of algae, lichen, fungus, moss and mould – the root causes of properties looking "dirty" – has been treated, the natural "self-cleansing" of sun, rain and wind removes the surface residue through time.
By educating the cleaning trade and public about soft washing we are helping develop an industry that offers sustainable treatments to clean and maintain exterior hard surfaces.
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The free guide shows you – step by step – how to easily, quickly, and accurately create softwash business quotes.
This saves you time, is a highly professional approach, and increases your chances of winning new contracts.