He wrote: "Can I use Bio Cleanze to softwash uPVC, or does it have to be Benz Lightning Cleanze? If it has to be Lightning Cleanze how do you do it if the rendered walls of the house are only being treated with Bio Cleanze?
"My customers clearly want their uPVC gutters, soffit, facia, window frames, doors, etc cleaned but it is very hard work by hand and I wondered if you could help."
We replied ...
Yes, Bio Cleanze could be used to softwash uPVC. But ... it's not what we recommend as the product of choice.
This is because uPVC is a non-porous surface and we generally recommend treating uPVC, and other non-porous surfaces, with Lightning Cleanze at 10:1. Simply spray, give a light agitation with a brush where necessary, and then rinse before it dries.
Most often, you'll find that Lightning Cleanze will easily get uPVC clean within a matter of 10-15 minutes, when it can be rinsed off to leave a wonderfully clean uPVC surface.
At the same time, if you are going to softwash the surrounding render, you could "spot treat" any particularly badly contaminated areas. At 10:1 it will not give instant results but will certainly help. Then treat all the render with Bio Cleanze as normal.
We hope this information helps you softwash uPVC quickly, effectively and safely.
Ben, Leo & Fiona
Quick tip: Before softwashing an entire property, always – with your customer's permission – treat a small test patch first, to determine the optimum product and product dilution for the specific surface you are treating.