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There are two types porous and non porous. You can also seel porous concrete to make it non porous.
Yes vinyl is non porous
* able to absorb fluids; "the partly porous walls of our digestive system"; "compactin the soil to make it less porous" * full of pores or vessels or holes == ==
There is one called PORCERAX that is porous.
By making the pellets porous, you maximize the surface to volume ratio of the catalyst, which allows you to use less of it, but get the same effect.
No, chalkboards are a porous material.
There are two types porous and non porous. You can also seel porous concrete to make it non porous.
Yes vinyl is non porous
Concrete is porous and therefore has the ability to absorb from the surface.
* able to absorb fluids; "the partly porous walls of our digestive system"; "compactin the soil to make it less porous" * full of pores or vessels or holes == ==
Leather is porous unless the surface has been waterproofed. Dubbin is one product that is frequently used to waterproof walker's boots.
There is one called PORCERAX that is porous.
By making the pellets porous, you maximize the surface to volume ratio of the catalyst, which allows you to use less of it, but get the same effect.
couldn't you but paint on a finger and press into it???
Mosses
liverworts
Anything surface that won't absorb liquid, i.e. tile, glass, stone, laminated, varnished wood. Bare, untreated wood would be considered a porous surface. hope this helps