Packaged in 50 Lb bag.
HYDROPERM is used to produce permeable plaster molds for casting of many non-ferrous metals and alloys. Properly prepared molds made with HYDROPERM Cement have a permeability range which can be varied and controlled to meet particular requirements of the various non-ferrous metals and have an extremely smooth surface. Just under the surface is a porous structure of small uniform cells that are interconnected. When the mold is dried, they offer channels through which steam or other mold gases may escape during the metal-casting operation.
Consult technical bulletin to obtain proper mixing procedures.
Use Consistency (100 parts of water by weight per 100 parts plaster)
Maximum Setting Expansion 0.140%
Density Wet 40.0 lb/ft3
Set Time (Hand Mix) 12 - 19 min.
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