Browse Forums Building A New House Re: Building with MgO Sulphate Board + Render 6Jul 07, 2020 10:01 pm Adl1 alexp79 For exterior usage you use the sandable elastomer compound on joints (for outdoor use) and then prime (skim) with 2 coats of masonry primer. If you skim over, the look you get will be the same as Level 5 finish with gyprock. I heard a lot of good words about Rescom boards https://www.mgobuildingsupplies.com.au/ (they are not CodeMark certified but they have done all the necessary testing with Intertek) although I know that, unfortunately, Australian pricing is not even closely comparable to pricing you get from top factories in China. Looks like this product has chloride. Rescom MgO Corp Board is manufactured from a combination of magnesium oxide and magnesium chloride and includes fibrous reinforcement. The only Australian MgO Sulphate board I have found on the net is Firecrunch. Apparently their product is quite expensive and they had some terrible reviews with their older product using chloride instead of sulphate. Yes, normally Rescom is supposed to be used indoors where chloride is not an issue. Firecrunch are extremely expensive. Considering you are planning to use it for outdoor cladding, I would have gone for Firecrunch as at least it is certified. You will be definitely having issues installing uncertified exterior cladding. Thanks for clarifying. Sorry I misunderstood your point 7 6976 Hi Alex, Thanks for the reply again. I had a chat with the builder, he said he will use primer, then hydrotec which comes with colour and sealer as well. A Renderer I… 12 18072 I am looking for someone who might have tackled a similar issue as me. I have a few rendered interior walls, the surface condition is hardly flat. I can see all the bumps… 0 7964 |