Published on January 27th, 2013 | by Grant Barnard95
Types of Primer – When and Why to use these different primers
There are so many primers on the market today. Its hard to know when to use the best one. Or when to use a primer at all. Now there is even Paint and Primer in One.
Why Use a Primer? – Simple. The primer allows for the top coat to dry like it was intended to. When the topcoat dries by the liquids soaking in to the surface, the film forms basically upside down.
We split this topic into two sections. Different Types of Primers –and- Different Situations That Require a Primer.
Different Types of Primers
Different Situations That Require a Primer –
- Water Stains – Water damage is best covered up by an Alkyd Primer. Try using this out of a spray can for best results. Apply with two or three very light coats so they dry quickly
- Patches – If there is a ton of patch work the best thing is to use a PVA Primer on the entire wall. Or if you just have a few spots try a few light coats with Alkyd Primer in a spray can.
- New Drywall – New Drywall should always take PVA primer first. This will seal the drywall so the solvents from the topcoat cannot penetrate and crack the drywall. If the drywall job was poorly done then one or even two coats of acrylic will do the job justice. High build primers will also fill in minor defects in the drywall job but do not seal very well so a PVA would have to be used first on the drywall.
- Smoke Damage – Smoke Damage is best covered with BIN Primer. Remember to have the guy at the counter shake this up twice. No other primer will dry quick enough for the smoke damage to not come through. PVA and acrylic primers will also work but take at least two coats to stop the smoke damage from coming through
- Chalky Areas – Any chalky areas will need to be power washed first using TSP. What doesn’t come off can be covered with an excellent acrylic primer. The acrylic primer will bond like glue.
- Hardy Board (Composite Wood) – This is a topic of little known facts. Most will tell you to use any primer you want. NOT TRUE. Most solvent even in water based paints will destroy the glue that holds the wood together! We only use one primer from our paint manufacture PPG Porter paints. A100 Primer. Then we go with a higher quality topcoat
- Extreme Color Change – For going from a dark or bright color use acrylic primer. Most color changes, even somewhat extreme, can be handled by a PVA primer
- Bare Metals – There are many choices here. Generally they are all oil based with the exception of a few water based primers that are just OK for metal. If there is any risk of rust a rust prevention primer WITHOUT TINT is necessary.
- Wood – Most paint manufactures make a good primer for wood. It should be a high build so it fills in cracks. Really any high quality acrylic primer should work just fine. If you really need to seal it up good go to an oil based primer.