CSLB C-33 Painting & DecoratingSurface PreparationEasy
A painting contractor is preparing to paint a newly installed, unprimed interior wooden door jamb. The wood is clean and smooth. What type of primer is generally recommended for this application to ensure good adhesion and a smooth finish?
- AEpoxy primer
- BOil-based stain-blocking primer
- CPVA primer
- DWater-based acrylic latex primer
Show answer & explanationAnswer & explanation
Correct answer: D. Water-based acrylic latex primer
For new, clean interior wood, a water-based acrylic latex primer is generally recommended. It provides good adhesion, dries quickly, is easy to clean up, and creates a smooth surface for topcoats. While oil-based primers can be used, water-based is often preferred for interior wood unless stain-blocking for knots is a significant concern.
Why the other options are wrong
- A. Epoxy primers are heavy-duty and typically used for challenging or industrial applications, not standard interior wood.
- B. Oil-based stain-blocking primers are good but often overkill for clean, knot-free interior wood, and have longer dry times/fumes.
- C. PVA primers are typically for drywall and plaster, not ideal for wood.
Interior Wood Priming
The application of a primer to new or bare interior wood surfaces to promote adhesion, seal the wood, and create a uniform base for paint.
- Enhances topcoat adhesion and durability.
- Helps seal porous wood.
- Water-based acrylics are common for general use.
Memory trick: Clean wood, water-based, smooth finish, easy prime.