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# Primer: Primer is a preparatory coating applied to a…

**Category:** Construction & Remodeling · **Complexity:** Simple · **Also known as:** primer coat, undercoat, sealer coat

## Definition

Primer is a preparatory coating applied to a surface before paint to improve adhesion, seal porous materials, and create a uniform base. Skipping primer is one of the most common DIY mistakes.

## Common Questions

### Can I use paint-and-primer-in-one and skip the primer step?

On previously painted surfaces in good condition, yes. On new drywall or fresh patches, a dedicated primer is still recommended.

### When do I absolutely need a separate primer?

Always on bare new drywall, after wallpaper removal, when making drastic color changes, and over stains or water damage.

## Real-World Example

You'd see this when CRM Services completes new drywall installation in a home addition in Orchards, WA.

## Why It Matters

Primer is part of the professional process that separates a lasting paint job from one that fails in two years.

## Related Terms

- [Paint Sheen](https://www.crmsvc.com/glossary/paint-sheen.md): Paint sheen refers to the level of gloss or reflectivity in a paint finish, ranging from flat to gloss.
- [Skim Coat](https://www.crmsvc.com/glossary/skim-coat.md): A skim coat is a thin layer of joint compound — typically 1/16 to ⅛ inch thick — applied over an entire wall surface to create a perfectly smooth, paint-ready finish.
- [Drywall Finishing Levels (Level 0-5)](https://www.crmsvc.com/glossary/drywall-finishing-levels.md): Drywall finishing levels are a standardized 6-step scale (Level 0 through Level 5) defined by the Gypsum Association that describes how smooth and refined a drywall surface is.

## Related Services

- [services painting](https://www.crmsvc.com/services/painting.md)
- [services drywall](https://www.crmsvc.com/services/drywall.md)

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*CRM Services, LLC — Licensed, bonded & insured home remodeling and repair contractor in Vancouver, WA (WA license CC CRMSESL844MK). Serving Clark County and SW Washington within 50 miles. 5.0★ from 41+ Google reviews, A+ BBB. Call (503) 898-0276, email quotes@crmsvc.com, or request a free estimate at https://www.crmsvc.com/#contact*