This is particularly true for lighter colored stones like santa cecilia granite and white granite.
Least porous granite.
Like all natural stone granite is susceptible to liquid sinking into its surface.
Staining can be easily controlled by application of a sealer on these surfaces.
How porous is granite compared to marble.
Even worse germs bacteria and mold can invade unsealed granite counter tops with stains running not far behind.
Most granite is porous to a certain degree and thus susceptible to staining.
Porous materials have minute surface holes that liquids may penetrate leaving stains and eventually eroding or cracking the surface.
Also granite is immune from the damages of most common household acids.
Strictly speaking some tests measure the accessible void the total amount of void space accessible from the surface cf.
Much like granite marble is one of the most common countertop materials chosen by homeowners.
That s very low but the op s granite s absorption rate is even lower at 05 15 so maybe that makes a difference with haze i don t know.
Porosity or void fraction is a measure of the void i e.
Empty spaces in a material and is a fraction of the volume of voids over the total volume between 0 and 1 or as a percentage between 0 and 100.
There are many ways to test porosity in a.
But while granite is one of the least porous natural stones that is not the case with marble.
By comparison a more stain prone granite like kashmir white has an absorption rate of 3 5 and would definitely need sealer.
Marble countertops are very porous and require re sealing once every few months.
Porous materials such as granite marble and concrete need to be sealed regularly about every six months says courter.