I get asked quite frequently if you need to prime bare drywall. Yes, absolutely! You need a primer for drywall that is bare! After sanding and cleaning, and Before start painting your newly installed Drywall you need to prime it.
This is absolutely necessary! And No, paint and primer in one is not an option! Priming your drywall with a PVA primer will seal the surface and provide a bonding opportunity for your paint.
Some of the best drywall primers are:
Benjamin Moore Fresh Start
This high-hiding acrylic interior primer is great because it has a high build and covers really well. It is in my opinion the best drywall primer to hide imperfections.
It has the consistency and thickness of a good flat white ceiling paint.
We use it a lot at 518 painters to paint garages and to appease banks when the customer needs to prepare bare drywall for inspections without having to actually topcoat. 1 coat of this primer will have the appearance of a flat white painted wall.
In addition, we use this primer mostly to prime new garage drywall, new basement drywall, and old drywall because of its stain blocking capabilities.
And in my personal opinion, this is the best new drywall primer for your money.
- Maximum hiding for interior surfaces
- Excellent all-around stain blocker
- Fast drying
- Low VOC
- Mildew resistant
- Superior adhesion
Zinsser Drywall Primer
This water-based primer is great for sealing bare drywall.
It is our personal favorite when priming patches.
Additionally, it is low cost and seals great.
Therefore, for us, it is the best primer for drywall patches.
Dry-time is usually within 30 minutes of application. Depending on the room temperature and humidity.
It sands real easy and is fairly low cost.
- Ideal for sealing new drywall
- Fast drying – seals surfaces for painting in one hour
- Low odor
- Won’t raise the nap on new drywall
- Water-based formula – easy water clean-up
- Sands easily – creates a smooth surface for painting
Glidden PVA Drywall Primer
This acrylic primer and sealer is very low cost but gets the job done.
We like to use this primer for new construction at 518 Painters in Albany NY.
It is great for big jobs if you are trying to budget your product cost.
In addition, it is not high build and has the consistency of.
The newly installed drywall is very porous. So is the joint compound that is used for the installation. Paint will not adhere properly to bare drywall. It is also very porous and will need to use more paint because it will soak up more material than a surface that is properly sealed. Therefore, it is necessary to use a PVA primer for drywall. Besides sealing the surface it also acts as an adhesion promoter for the paint that will be applied.
How To Apply Drywall Primer
You can spray it on by using a paint sprayer or you can brush and roll using a Nylon brush and a 3/8 inch microfiber roller.
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Make sure you de-lint the roller before painting.
Here is a quick example:
PVA Primers have a fast drying time. Usually, they dry to touch in 30 minutes at 77°F (25°C) and 50% humidity
What is PVA Primer Made Of?
is an origin of polyvinyl acetate. In addition, it is a colorless, odorless, non-toxic, transparent, thermoplastic, water-insoluble resin.
In addition, It is usually thinner in consistency compared to paint but not as thin as a shellac-based primer for instance.
What Does PVA Primer Do?
PVA primers are designed to seal porous surfaces such as new drywall. It has the ability to keep moisture from getting into your drywall. Once water gets into drywall it can cause mildew or mold to grow.
Mildew is a surface fungus. It is white or grey in color and grows on moist surfaces. You can treat mildew with a store-bought cleaner and a scrubbing brush.
Mold on the other hand is black or green in color and is in most cases the result of a much larger infestation.
Therefore, you want to seal bare drywall and any new patchwork with the best drywall primer for bathrooms such as the before mentioned Fresh Start
Sealing Your Drywall
will not only make it harder for moisture to enter and spread, but it also allows for an even finish when applying your topcoat.
You will see this a lot in homes that are in new housing developments.
Contractors will paint those walls and ceilings using an airless sprayer and flat paint. The flat paint is not only cheaper but it will hide imperfections more than a higher sheen paint, therefore contractors use the flat paint.
The downside to this is that your walls are now what we like to call
“thirsty”. Whenever you paint thirsty walls, the paint will soak into the previous finish and dry uneven and blotchy.
PVA primers will prevent this from happening and help you achieve an even finish.
Will It Block Stains?
is very transparent and will not block any stains.
Some primers are tintable up to 2 oz per gallon. This depends on the brand so be sure to read the label or ask the distributor of the product i.e your hardware or paint store.
If you need to block stains you will have to consider a stain-blocking primer such as shellac-based or oil-based primer.
You can use PVA primer over bare and previously painted drywall, plaster, wood, and masonry. Although it is possible, we suggest you use a better-suited primer for wood and masonry.
Clean-up is easily done with water.
If you choose not to prime your drywall, your paint will not bond to the surface causing it to eventually fail and peel.
How Do You Fix Drywall That Hasn’t Been Primed?
If this happens you will have no other option but to remove the paint completely (or as much as you can), prime your Sheetrock and start over.
Low Cost PVA Primer
You can pick up a low-cost PVA primer for drywall at the Home Depot. Kilz works great!
A 5-gallon bucket currently costs ca. $50 US and works well enough to seal your joint compound and Sheetrock.
Additionally, you should always prime any patchwork with a PVA primer.
This will cause your patches to be less porous and help you achieve a more even finish and less noticeable patch after painting it.
We always suggest 2 topcoats after priming.
If you are interested in learning more about wood primers (specifically for kitchen cabinets and furniture) you should check out this article that breaks down the “best primers for kitchen cabinets”