Origin of porous
Examples from the Web for nonporous
When a wooden case is used, jars made of rubber, or some other nonporous, acid-resisting material are necessary.
A porous separator allows more energy to be drawn from the battery than a nonporous one.
When the skin is ready to apply, coat this plaster cast with some nonporous modelling material.Home Taxidermy for Pleasure and Profit|Albert B. Farnham