How heavy would an area 12 inch high x 48 inches long if I casted a thin rock face with hydrcal?
Doug
According to the manufacturer, after it has dried, Hydrocal weighs 90 lbs/cubic foot.
If your casting is 1/2" think, it would be 288 cubic inches which is .167 cubic foot so the casting would weigh 15 pounds.
They claim that “lightweight” Hydrocal weighs half as much.