Browse Forums Owner Builder Forum Re: Non-standard (acrylic) "breathable" paints 24Dec 29, 2020 11:46 am Mirrmu83 Murobond has <10% acrylic polymer. See safety sheet. Film forming. Are you suggesting the lime mix as a basecoat or finish coat? Rockcote Lime Plaster is a finishing coat. long time between replies, I didn't get notifications of your comments theoretically lime (NHL2) can be used for all layers of your wall system - difference is based on the granular size of the prpduct you mix it with, and proportions. So base coat is a coarse sand, with lime. Main wall coat is a finer washed sand, with lime (forget the proportions). I managed to match - exactly - the original lime render of my 1927 house using local washed river sand. Skim coat should be - lime - mixed with a very very fine sand. OR gypsum. Problem is getting info on gypsum. CSR product is I believe not pure and their technical department cannot answer questions about it. Western Australia use this more regularly, they do double brick houses, but here in nsw its difficult to get good clear info Re: Non-standard (acrylic) "breathable" paints 25Dec 29, 2020 11:48 am Mirrmu83 I don't believe so. The problem is customers want to be able to choose from 3000+ colours like if selecting a Dulux or Taubmans colour. It just doesn't happen with "mineral" based products. So they introduce an acrylic system which can utilise typical paint tints. To achieve a breathable wall is very easy. Use sand, cement and lime renders. An admixture of boncrete at 1:10 can be used for water. Oxide is added for colour. If polystyrene blocks/cladding is used then breathability will reduce as more polymers are added to render to make it stick to polystyrene. Straw bale industry would be a good place to investigate. adding cement and bondcrete to your wall system will not make it breathable. Bondcrete is essentially plastic, and cement is not breathable Re: Non-standard (acrylic) "breathable" paints 26Dec 29, 2020 11:49 am Debunk Mirrmu83 I don't believe so. The problem is customers want to be able to choose from 3000+ colours like if selecting a Dulux or Taubmans colour. It just doesn't happen with "mineral" based products. So they introduce an acrylic system which can utilise typical paint tints. To achieve a breathable wall is very easy. Use sand, cement and lime renders. An admixture of boncrete at 1:10 can be used for water. Oxide is added for colour. If polystyrene blocks/cladding is used then breathability will reduce as more polymers are added to render to make it stick to polystyrene. Straw bale industry would be a good place to investigate. adding cement and bondcrete to your wall system will not make it breathable. Bondcrete is essentially plastic, and cement is not breathable agree strawbale industry is excellent place to go - the walls have to be 100% breathable The yellowing mainly occurs to white or very light colours. 1 2947 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 18097 Suggestions please for acrylic rendering Color to match austral brick urban one pepper. Pic for reference. Thanks 0 5071 |