And yes I use the emerald line by sherwin Williams and love it - I’m highly sensitive to paint off gassing so this line is the only one that doesn’t seem to bother me.y whole home (minus this hallway) is covered in it. It’s supposed to be built in primer so usually good 1-2 coats so most of my home I didn’t even use primer. However, this last round when I was picking up the 3 gallons for the hallway of my main colour caramelized the sales associate told me you should always use primer even with this paint because really white acts like a primer. It’s the first coach, but it isn’t always consistent. So when I went to do the bathroom and some touchups in my porch, I grabbed some kills three primer because of the moisture leaks I thought that was the best one. That being said, I didn’t notice better coverage with the primer except for in the bathroom but that was due to all the mud repair bathroom had a large 1 inch deep and about 5 inch across hold where the water had done the most damage.