Renner 643 White Primer 1K/2K

✅ Ideal For

• Interior woodwork and MDF components

• Shops and finishers needing a reliable, high-build white primer

• Projects requiring fast dry times and smooth sanding

• Applications where optional 2K catalysis boosts adhesion or blocks maple sugars

💙 Why Finishers Love It

• Super versatile primer that performs well on almost any interior wood substrate

• Fast drying: dust-free in 30 minutes and sandable in 4 hours

• Smooth sanding for flawless topcoat appearance

• Optional 10% catalysis improves adhesion and helps block maple sugars

• Water-based formula keeps shop conditions cleaner and safer

• Sprays beautifully with HVLP, gravity, airless, or air-assist

🎨 Finish Options

• White

🧪 Product Specs

Use: Interior wood & MDF
Technology: Water-based primer
1K/2K: Use alone or catalyze between 5- 10% with YC-M404 (6.4-12.8 oz/gal)
Recommended Coats: Up to 3

Coverage

• 6–10 m²/L ( 240–400 ft²/gal )

Wet Film Build

• 150–200 g/m² ( 6–8 wet mils )

Drying Times

• Dust-free: 30 minutes

• Touch dry: 1 hour

• Sandable: 4 hours

• Stackable: 4 hours

• Final cure: 8 hours

Surface Prep

• Sand before application: 180–220 grit

• Sand before overcoating: 280–320 grit

Application Conditions

• Minimum temperature: >15°C (60°F)

• Ideal temperature: 20–25°C (68–77°F)

🛠 Spray Equipment Guide

Gravity Cup Gun

• Tip: 1.9–2.5 mm

HVLP

• Tip: 1.9–2.2 mm

Air-Assist / Airmix

• Nozzle: 11 or 0.6–0.9 mm

Airless

• Tip: 306–308

Cleanup: Clean all equipment with water immediately after use.
Thinning: Up to 10% water if desired.
Pot Life (when catalyzed): 3–4 hours.

🌡 Handling & Storage

• Storage temperature: 5–35°C (41–95°F)

• Interior use only