Primer is the unsung hero of a flawless paint job. It ensures better adhesion, smoother coverage, and longer-lasting results. But with so many options—oil-based, latex, stain-blocking, bonding—it can be tricky to know which one to choose. Below, we answer the most common questions about selecting the right primer.
1. Why is primer necessary before painting?
Primer creates a smooth, even surface that helps paint stick better, prevents stains from bleeding through, and extends the life of your paint job. Skipping primer often leads to uneven coverage and peeling.
2. What types of primer are available?
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Latex (water-based) primer: Quick-drying, low odor, and great for drywall, softwoods, and painted surfaces.
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Oil-based primer: Excellent stain-blocking properties, ideal for wood, metal, and surfaces prone to tannin bleed.
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Shellac primer: The strongest stain blocker; great for smoke or water-damaged walls.
- Bonding primer: Designed for slick surfaces like glass, tile, or glossy paint.
3. How do I know which primer to use for my project?
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New drywall: Latex primer for easy coverage.
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Bare wood: Oil-based primer to prevent tannin bleed.
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Stained or smoke-damaged walls: Shellac primer for maximum blocking.
- Glossy or hard-to-paint surfaces: Bonding primer for adhesion.
👉 Explore Randall’s paint collectionfor primers suited to any project.
4. Do I need primer if I’m repainting with the same colour?
Not always. If the surface is in good condition and you’re using a paint-and-primer-in-one product, you may not need a separate primer. However, primer is still recommended for older, uneven, or stained walls.
5. How many coats of primer should I apply?
- One coat is often enough for smooth, clean surfaces.
- Two coats may be needed for dark-to-light colour changes, stained surfaces, or porous materials.
6. How long should primer dry before painting?
Most primers dry in 1–4 hours, but some specialty primers may take longer. Always follow manufacturer instructions for best results.
7. What happens if I skip primer?
Skipping primer can lead to:
- Uneven colour and sheen
- Peeling or chipping paint
- Stains bleeding through
- Shorter lifespan of your paint job
8. Can I use the same primer indoors and outdoors?
Not always. Interior primers are designed for drywall, plaster, and indoor stains. Exterior primers are formulated to resist weather, moisture, and mildew. Choose accordingly for durability.
9. Should I hire a professional to handle priming?
If you’re unsure which primer to use or dealing with difficult surfaces, a professional can ensure the job is done right. Submit our Painter Order Formto connect with trusted experts.
10. Can Randall’s help me pick the right primer?
Absolutely! We offer:
- Expert consultations on primers and paints
- Quality primer and paint options in-store and online
- Professional painting referrals through our services
- Personalized support via our Contact Us
Primer is the foundation of every great paint job. Whether you’re painting drywall, wood, stained surfaces, or glossy finishes, choosing the right primer ensures your topcoat looks better and lasts longer.
Randall’s has everything you need—premium primers, expert guidance, and professional painters—to help your project succeed.