No issues with k rend its similar to the silicon stuff you were referring to k rend hypo or bio can be used but not sure about the silicon render I haven’t come across it as far as ime aware
From the pictures it’s hard to tell but looks like painted concrete?… I would definitely do that with a hypo mix try a bit low down out the way first as a test patch 6-1 mix see what happens you can always increase to a 5-1 or 4-1 if needed, cold weather will slow the killing effect of the hypo down so either givebit a longer dwell time or a slightly stronger mix if needed
My personal preference with that amount of area taken up by window and door frames would be to scrub it with a hypo mix to avoid run-off. But thats just me.
I don't think the customer knows what he's talking about
This is what I found for a customer who had a silicone render done last year How to clean EWI Pro renders - EWI Pro Insulation Systems this is the render that was used and it looks shiny and bright like it has been painted, they have an issue with their cat sitting on the deep rendered sills and wanted to know if I knew how to clean it, wfp won't touch it and they haven't bothered with sills since the render was done
I’m going with that being TC15 silicone as K1 silicone has more of a porous look when it’s finished, hypo with surfactant to cling on will do you not to strong on first go see how it comes up, wet the lead up first though if it goes a bit rusty looking when dry hit it with a bit of oxalyic or if it’s gone powdery white a 2nd rinse & wipe over with patination oil
Thank you for that - and it's basically the same thing that K Rend and Weber say on their sites and all sell their own overpriced BAC50 based type of biocide
A biocide probably better then at a guess? ?
Probably but that’s a guess
