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The final universal primer we will discuss is the oil (actually "Alkyd") universal primers. All oil universals are fast drying primers. Rather than taking 24 -48 hours to dry like a conventional oil primer, they dry in about 30 minutes to 1 hour. Two downsides to this fast drying ability are the strong fast evaporating
solvents used with this type of primer . You absolutely need to provide good ventilation with oil universal primers, some are worse than others, but all require good ventilation. I am a painting contractor and I deal with paint odors daily. I am not bothered by most paints - but oil universal primers are one that I make sure the windows are open etc... when I use it . You will quickly be overcome with the solvent fumes if you don't heed this warning.
Having said this I think that Zinsser's Coverstain is probably the most "universal" of the universal primers. It is both an interior and exterior primer (unlike shellac which is interior only and some other oil universal primers which are too brittle to use on the exterior) it sands well enough to be used on interior trim (UMA sands better in my opinion), is a good stain kill primer , has very good adhesion to most surfaces, and is pretty inexpensive. I carry all three types of universal primers on my truck and use the best one for each and every situation, but if I had to only carry one universal primer, it would have to be the oil version and more specifically it would be Coverstain primer by Zinsser because it is truly the most versatile of them all.
The other oil universal primer that I like to use is XIM's version which is called "400 white". If you need a universal primer that has extremely good adhesion, 400 White is the way to go. 400 white is very fast drying, sometimes maybe a bit too fast (XIM makes a retarded for longer "working time" when needed), which requires that you don't "re-work" of re- brush over primer that you have just laid down or you will kind of tear up and lift the previously laid down primer leaving a gritty blended area that will need to be sanded smooth after drying. 400 White is also a bit more expensive than most other oil universals, But it is a very good product and is my second choice for oil universal primer.
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Universal Primers - part 3
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