Darbond porosity infiltration sealants are used for sealing the micropores in the castings to prevent leakage.

Vacuum Impregnation Porosity Sealant 290C
Features:
--Low viscosity, good penetration capability
--Cures under 90C water by heating
--Excellent water washable property, easy cleaning
--Especially used for sealing micropores to stop leakage of porous aluminum alloy castings for automobile, internal combustion engine etc.