Calcium sulfate

Is Plaster Fire Resistant

Does plaster have a fire rating? Gypsum-based plaster at 5/8-inch is sufficient to produce a one-hour fire-rated wall. Portland cement-based … More

What Type Of Rock Is Gypsum

What sedimentary rock is gypsum? Rock gypsum (a.k.a. gyprock) is a chemical sedimentary rock. It is an example of an … More

Is Gypsum Dangerous

Is gypsum dangerous to humans? If handled improperly, gypsum can cause irritation to the skin, eyes, mucous membranes and the … More