1.   Cracks should be repaired with a filler, and porous surfaces primed with a sealant or a diluted coat of masonry paint.

2.   A cleaner that should not be used on porous surfaces.

3.   Graham found that light gases diffuse through porous surfaces more rapidly than heavy gases.

4.   And since water entering the porous surface directly will also cause damage, try covering the pots with plastic tarps.

5.   In extreme cases, it may be necessary to have the wall sandblasted to expose a more porous surface.

6.   It is difficult to clean mildew and mold off porous surfaces like wallpaper or fabric.

7.   Now, you have to seal the porous surface of the pan.

8.   Some insist on washing with water only, believing that soap will leach into the porous surface.

9.   The system is based on the fact that sound is reflected from hard objects buried a few inches to a few feet under a porous surface like dirt.

10.   Those projects will be required to have porous surfaces, dry wells or use other techniques to allow rain water to enter the ground.