New answers tagged plaster
The working time of setting-type plaster is a consequence of that plaster's ingredients. In the US, setting-type drywall compound (e.g. Sheetrock Easy Sand) can be had in a wide range of drying times from 5 to 210 minutes. If your mix is getting crumbly after 15 minutes, you might just have the wrong product. Combining setting and pre-mixed compound is not ...
if its from the 50's the chances are very high. however, it is region specific often. if you are located in the eastern us or canada, there is a very good chance of it. if you are worried about it, you can remove a small sample and take it to a local health lab or college chemistry lab and have it tested.
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