This is because it's a nonporous surface.

Mix epoxy on a nonporous surface like a piece of aluminum foil or a plastic can lid.

"You only do this on nonporous surfaces - wood, metal, plaster."

These are fired at over 1,100C, causing the clay to vitrify and form a nonporous surface.

Because of its polished nonporous surface, it may be sterilized in boiling water, or in an autoclave.

Any nonporous surface can be used for molding chocolate.

Vacuum metal deposition is the Cadillac of techniques for raising latent prints on nonporous surfaces.

Some nonporous surfaces may also be polished.

Wax pencils are primarily used to write onto nonporous surfaces such as porcelain or glass.

It adheres best to dry, nonporous surfaces at room temperature, which can then be submerged after application.