What is Non-porous Masonry?

[rj]

What, if any masonry products are considered non-porous? I assume CMU is

*not* non-porous.

Thanks in advance for sharing your knowledge.

[Robert Allison]

Hard fired brick, some ceramic tiles, some types of marble, granite, smooth concrete that has been sealed, some types of masonry finishes, such as epoxy coatings, etc.

[RicodJour]

You're so literal! I thought he was asking about mortar and concrete mix that had hardened in the bag. :)

R

[rj]

[Robert Allison]

Now that was funny!