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20 Minute Casting Plaster

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Price: $21.50
Manufacturer: US Gypsum
Part No: MPLCAST20-50#

20 Minute Casting Plaster – Sold in 50 Lb Bags.

Check out this helpful Plaster Calculator by Glazy: https://plaster.glazy.org/

20 Minute Casting is an economical general purpose industrial plaster suitable where expansion control, hardness, and strength are not of major importance. Working properties are similar to Hydrocal-White.

 (Please note - 50 Lb bags are not available 100% of the time. Contact us for availability, 100 pound bags may only be available certain times of the year)

parts water to 100 parts plaster by weight pounds plaster to 1 gallon water

Settimg Time

% Expansion

20 minute casting 70 11.4 30 .200 2000
Warning. This product can expose you to chemicals including crystalline silica (airborne particles of respirable size), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov Health Hazard Warning
  • Please handle all raw materials with safety in mind. The Dry form of all clay, glaze, and raw materials can expose you to hazards when not handled properly.
  • When handling and mixing DRY ceramic materials and powders, wear a full breathing respirator, eye protection, and gloves to protect your lungs and hands
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