Industrial Paint- Paint that would normally be used to paint industrial items such as structural steel, chemical plants, and pulp and paper mills. It usually has greater chemical resistance and a faster drying time than regular house paint.

Inhibitive Pigment- One which retards corrosion process.

Inhibitor- Primer or other material used to retard rusting or corrosion.

Inlay- Decorative ornamentation set into the surface of a particular space.

Inorganic- Containing no carbon.

Intercoat adhesion- The adhesion between two coats of paint.

Interior- The inside surface of a structure.

Intumesce- To form a voluminous char on ignition; foaming or swelling when exposed to a flame.