Should I use a brush or a sprayer to apply primer?

While <a href="https://www.homedepot.com/b/Paint-Primers/Roller/N-5yc1vZbt0tZ1z0ky1u?emt=plpfaq_2408_primers" style="text-decoration: underline;">rollers</a> are great for larger areas, <a href="https://www.homedepot.com/b/Paint-Primers/Brush/N-5yc1vZbt0tZ1z0ky1w?emt=plpfaq_2408_primers" style="text-decoration: underline;">brushes</a> are best for tackling smaller areas and corners and achieving a more precise application. <a href="https://www.homedepot.com/b/Paint-Primers/Paint-Sprayer/N-5yc1vZbt0tZ1z0kg49?emt=plpfaq_2408_primers" style="text-decoration: underline;">Sprayers</a> are also an option, especially for large projects, requiring careful handling and proper ventilation.

What is the difference between a flat and a semi-gloss primer?

The sheen of a primer refers to its level of reflectivity. A <a href="https://www.homedepot.com/b/Paint-Primers/Flat/N-5yc1vZbt0tZ1z1vuja?emt=plpfaq_2408_primers" style="text-decoration: underline;">flat primer</a> has a matte finish, offering a subtle, non-reflective look. This is a good choice for walls and ceilings, as it can help to hide minor imperfections. On the other hand, a <a href="https://www.homedepot.com/b/Paint-Primers/Semi-Gloss/N-5yc1vZbt0tZ1z10m17?emt=plpfaq_2408_primers" style="text-decoration: underline;">semi-gloss primer</a> has a more reflective finish, which can help highlight the surface and make it more durable. This is a good choice for areas with high traffic or needing easy cleaning, like trim or doors.

Can you wait too long to paint after priming?

It's best to paint as soon as possible after priming. The primer needs time to dry completely, which can take a few hours to a whole day, depending on the type of primer and the conditions. The primer can harden and become less effective if you wait too long. You might also notice the paint not adhering and may even see the primer showing through the paint.