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Primers


Sunday, February 13, 2011 - Base coats include primers, sealers and a combination of both. A basecoat is applied under a topcoat to provide better adhesion or seal the surface for a more even application of finish to protect and sometimes colors the surface. Some topcoats don't require a primer such as when you're recoating well-adhered paint. Before painting any unpainted surface or patched areas you need to apply primer. Most primers or under-cover's contain little pigment and none of the expensive ingredients that give topcoats shine, wash-ability and durability.

If you are painting a material that varies in porosity, you need to use a sealer primer. The seal prevents the topcoat form being absorbed unevenly. Sealers also block stains such as Crayola that could bleed through.
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