Are regular black, white and grey paints diffirent from paints labeled as “Primer”? Can I use paints like white,black and grey as a primer? Or will using paints specifically labled as a primer work differently?
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Coatings chemist here:
Primers are different from topcoat layers in a couple ways depending on what you are coating.
Adhesion – primer on surfaces like walls or tool boxes or plastic substrate are made to promote adhesion to that material.
Hiding – primers typically are formulated to have higher pigment weight content. This means they hide the color that is below them. This allows your pretty topcoat colors to keep their true color.
Water resistance – typically industrial coatings and automotive coating primers are layers that protect the substrate from water. This is particularly useful for any coating over metal to protect from oxidizing your metal.
Impact resistance – industrial, automotive or coil coating primers typically are formulated with an epoxy resin that helps act as a miniature spring. This resists any impact damage from stones, tools or other hard objects that may contact it.
Appearance – primers are your first layer to positively contribute to a nice appearance.
Let me know if you have any other coatings related questions.
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