The Misconception About ‘Paint and Primer in One

Walk through any paint aisle and you’ll see it everywhere - “Paint + Primer in One" or ""Self-Priming." It sounds like the perfect shortcut. But while it’s a clever marketing term, it doesn’t mean you can skip using primer when it’s actually needed.

What “Paint and Primer in One” Actually Means

These paints are designed with added adhesion and sealing properties to improve coverage and performance. They’re great for repainting over clean, already painted surfaces that are in good shape.

But they are not a replacement for a true primer when you’re painting:

• New drywall

• Bare wood

• Stained or water-damaged areas

• High-contrast colour changes (like dark to light)

• Glossy surfaces or previously oil-based paints

In those situations, a dedicated primer is still essential.

🔬 The Science Behind It

Primer and paint are two different products:

• Primer soaks into surfaces, creating a bonding layer for paint to stick to. It also seals porous areas and can block stains or odors depending on the primer.

• Paint is formulated for color, coverage, and durability - not bonding or sealing raw materials.

What “Paint + Primer in One” really is: It’s not a true primer. Manufacturers add extra resins and binders to the paint formula to give it improved adhesion and sealing properties. This helps it stick better to previously painted surfaces and can reduce the number of coats needed. However, it doesn’t provide the deep bonding and sealing that a real primer does, especially on bare, damaged, or problem surfaces.

Using a paint-and-primer-in-one alone on these surfaces can result in poor adhesion, uneven color, or peeling over time.

The Right Product for the Right Job

At the professional level, we don’t skip primer when it’s needed because it affects how long your paint job will last. Proper priming helps:

• Prevent flashing or uneven sheen

• Lock in repairs and patchwork

• Extend paint longevity

• Ensure truer, more even colour

When a surface requires it, a primer should be applied first, followed by a high-quality paint for a durable, long-lasting finish.

🏁 The Takeaway

“Paint and primer in one” works great in the right situations, but it’s not a magic solution. Every surface is different - and using the proper system ensures your finish looks better and lasts longer.

That’s the difference between a DIY shortcut and a professional paint job done right.