I’m refurbishing double hung windows. A window maker said he used “paraffin oil” to weatherproof the sash guides rather than just paraffin. I googled for it but couldn’t get a good idea of what it is. There is some suggestion it is just mineral oil, or mineral oil with paraffin in it, but nothing definite.
Does anyone know what it is?
What do you use now for the sash guides on double hung windows?
charles