What Types of Drywall Primer Are There?
Depending on how skilled you are at installing your drywall, there’s bound to be some amount of imperfections.
If you’re already doing a professional grade job, with smooth mudding and taping without any kind of gaps laid down, standard drywall primer-sealer is probably what you’re looking for. This is pretty similar to any other primer used on walls, just made to bond properly with the drywall itself.
If, on the other hand, you’re dealing with some pock marking and minor ridges even after sanding, you’re looking for a high build primer which will help cover up any flaws made during the wall’s construction.
If you’re happy with the plaster’s color, then consider using a sealer. Don’t confuse these with primers, which will seal the drywall. Their chemical properties are almost entirely the opposite of what you’re looking for if you’re intent on changing the color of the wall.
A sealer will instead lay down a clear coat that seals the wall entirely, making it stain resistant and preventing moisture from getting through. Some of them can be painted over, but if you want to add some color to your room then they’re not the ideal choice.
There are also spackling pastes which can be used to apply an even, porous layer of mud. For most people these aren’t the ideal solution for the best looking wall, but if you want the quickest, easiest way to prime a wall they’ll do the job and you can texture them if you’d like.
If you’ve laid down a smooth texture on your drywall, you’ll find that simple latex primers also work quite well, and will help to even out the porosity of an ultrasmooth plaster finish. Imperceptible flaws can still lead to uneven absorption of paint.
Which type of primer you use will depend mostly on the finish of your wall. Bare walls will require different primers than textured walls, for instance.