Interior Primers

Primers are special coatings that are formulated to solve a variety of problems and to ensure better appearance and durability of the finish.

Interior Primers

One of the classic hallmarks of quality painting is careful surface preparation, and using a primer is often crucial to the success of the work.  Primers are special coatings that are formulated to solve a variety of problems and to ensure better appearance and durability of the finish. Among other things, the right primer will help paint adhere better, prevent stains from re-appearing, ensure more uniform color and sheen and generally enhance the end result. You don't always need to use a primer, but how do you know when you do? Here are some examples of when priming is necessary:

• New construction, including new drywall, plaster or wood.
• Metal surfaces
• Aluminum and galvanized iron
• Previously wallpapered surfaces
• Sizing for walls to be papered to create a sealed surface for the glue and so the paper can be removed later without damaging the drywall.
• Surfaces in poor condition
• Slick, glossy surfaces
• Porous surfaces such as brick, stucco or other masonry
• Water stained or smoke-damaged surfaces
• Dramatic color changes
• Changes from one type of coating to another, for example repainting an oil-based surface in a water-based product
• High humidity areas

There are three basic types of primers and sealers - latex or water-based, alkyd or oil-based and shellac-based. How do you know which type to use? In most cases a quality latex product will perform as well as or better than an oil-based product; however, on wood that is prone to tanin bleeding, such as redwood or cedar, or on surfaces with heavy chalking, use an oil-based primer for better stain blocking and paint adhesion. In the past shellac-based sealers were commonly used for blocking stains and odors, but modern products generally have supplanted them. One exception is sealing knot holes where shellac is still preferred.

Types of Primers (Can Be Oil or Latex)

There are many types of primers so you need to do your homework.

• New drywall primers
• Primer for wallpaper - use enamel undercoater
• Stain-blocking primers
• Vapor barrier for damp or high humidity areas
• Enamel undercoater for bare wood and previously painted wood for maximum top coat gloss and uniformity and for previously wallpapered surfaces.
• Bonding primer for slick or glossy surfaces for maximum adhesion

Be sure to consult with the experts at the paint store to get the right primer for your project. Priming is an important step that can make the difference between success and failure.