Back Priming- Applying a coat of paint to the back of woodwork or exterior siding to prevent moisture from entering the wood and causing the grain to swell.

Barrier- Shielding or blocking device.

Base- Tint base.

Binder- Film-forming ingredient that binds the particles together in a paint.

Bituminous Coating- Coal tar or asphalt coating.

Blast Cleaning- Cleaning with propelled abrasives.

Bleeding- Discoloration of a freshly applied topcoat caused by underlying finish penetrating outward.

Blistering- The forming of bubbles or pimples on the painted surface. Blistering is caused by moisture in the wood, by paint having been applied before the previous coat was dry, and by excessive heat during or after application.

Block Coat- (Barrier coat or transition primer) – tie coat (adhesive) between non-compatible paints.

Blushing- A gloss film turning flat or a clear lacquer turning white. Blushing is usually caused by moisture condensation during the drying process.

Body- The thickness or thinness of a liquid paint.

Boxing- Mixing paint by pouring from one container to another several times to ensure thorough mixing.

Breathe- Permit the passage of moisture vapor through a paint film without causing blistering, cracking or peeling.

Bristle Brush- A paint brush with filaments made up of animal hair strands usually hog hair. Bristle brushes are used for alkyd paint.

Build- Apparent thickness or depth of the paint after drying.

Burnishing- Shiny or lustrous spots on a paint surface caused by rubbing.