GALVANISED:
A ferrous metal that is covered with zinc to protect it from rusting.

GLAZING:
Glass, such as that used in doors and windows.

GLAZING COMPOUND:
A sealant, or putty that is used to seal a glass pane into its frame.

GLOSS:
The shininess or reflectiveness of a coating. Flat paints have no gloss; high gloss paints have very noticeable gloss.

GLOSS RETENTION:
The ability of a coating to maintain its gloss - pertains especially to semigloss and gloss exterior coatings.

GRAIN:
The direction, size, arrangement or appearance of the fibres in wood or veneer.

GRAIN CRACKING:
Cracking of a coating, parallel to the grain of the wood substance.

GRAIN RAISING:
The swelling and standing up of short, broken fibres of wood caused by absorption of a liquid. Water is particularly inclined to cause this.

GYPSUM:
Natural crystalline calcium sulfate used as an extender pigment in paint, and in the manufacture of gypsum wallboard and plaster of Paris.