What is a paint primer & why use it?

Paint Primer is a base coat used to help treat a surface before applying a topcoat. Accordingly, primer is formulated to ensure maximum adhesion. Better paint adhesion means your paint job lasts longer. Likewise, primer acts as a sealer for porous surfaces that would otherwise absorb the first few coats of paint.

You can use primer as a stain-blocker for walls. This is necessary for surfaces that typically flash through a single coat. In some cases, primer can reduce the number of painting coats needed for proper color coverage. It also strengthens the bond between the surface and topcoat, extending the life of your paint job.

Many color changes when going from lighter to darker or vice versa may require a coat of primer first.