![]() ![]() I think this was done to increase the working time, but the perlite makes it hard to get a smooth wall. In the Worley PDF it says to mix some of the Structo-Lite with the Diamond, but someone else who was also taught this method of plastering emailed me a few years back and said they were taught not add the Structo-Lite. It’s not hard as a rock in 30 seconds but it’s firm enough you can feel for irregularities. ![]() Even with that, once it’s on the wall you can rub your hand across it in less than 30 seconds. Some batches were so soupy I had trouble getting the plaster from hawk to trowel. ![]() With the Structo-Lite I was mixing a 3:1 ratio with water, and with the Diamond I was mixing it 2.5:1. The package says to not make more than you can work with in 30 minutes, but I would say it’s more like 10 minutes. The heat would be from the lime reacting with the water. It warns of it giving off heat when mixing with water, but I didn’t experience this, or at least not to the extent that I could tell. The Diamond Veneer Plaster is made up of Plaster of Paris, Hydrated Lime, Gypsum, and then it also says it may contain limestone or Dolomite. The Structo-Lite, which is used in the scratch and brown coats, is comprised of Gypsum Plaster and Expanded Perlite. It is a completely different animal than the Structo-Lite plaster. The product I skim coated with is the Diamond Veneer Finish Plaster. They are as smooth as glass and will require NO SANDING!!!! Woo-Hoo! The plaster walls are finished, and I couldn’t be happier with the way the they came out. ![]()
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