Romabio | Masonry Flat
For Interior & Exterior Masonry | Mineral-Based | Long-Lasting Flat Finish
🧼 1. Prep the Surface
Before painting, ensure your surface is:
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Clean, solid, and free of dust, oil, grease, and loose paint.
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Free from rising damp, salt deposits, or active water damage.
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Slightly dampened before application (especially when hot or sunny).
| Surface Type | Primer Needed? |
|---|---|
| Unpainted, absorbent brick or stone | ❌ No Primer Needed |
| Painted brick, concrete, Hardie board, stucco | ✅ Yes – MicroGrip Primer |
🎨 2. First Coat (Base Layer)
Masonry Flat is ready-to-use but can be diluted for easier application. We recommend 0–5% for brush/roller and 0–8% for sprayers.
🧪 BEFORE YOU START: Mix thoroughly and dampen your surface to improve bond and reduce flash drying.
🧪 Optional 5% Dilution for First Coat (Brush/Roller)
| Can Size | Amount of Paint | Max Water to Add (5%) |
|---|---|---|
| 1 Quart | 946ml | +47ml water |
| 1 Gallon | 3.78L | +189ml water |
| 5 Gallons | 18.9L | +945ml water |
Instructions:
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Always keep a wet edge. Work corner-to-corner.
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Allow to dry for 8–12 hours before applying a second coat.
☁️ 3. Second Coat (Finish Layer)
Apply your second coat using the same application method and dilution (if desired).
💡 Pro Tip: Work in the shade or early in the day. Mist surface lightly if it’s hot or dry to prevent flash drying.
Instructions:
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Re-mix if the paint has been sitting.
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Apply evenly across the surface.
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Avoid overworking one area.
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Dry for another 8–12 hours. Full cure in 15 days.
📏 Coverage Per Coat (Estimate)
| Can Size | Sq Ft | Sq Meters |
|---|---|---|
| 1 Quart | 50–65 | 4.6–6 m² |
| 1 Gallon | 200–260 | 18.5–24 m² |
| 5 Gallons | 1000–1300 | 93–121 m² |
🧰 Tools Checklist
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✅ Mild detergent and water for cleanup
🌱 Why Choose Masonry Flat?
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✅ No chipping or peeling – it silicatizes with your surface
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✅ Breathable & natural – zero VOC, mineral-based, environmentally responsible
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✅ 20-year durability – with proper prep and two coats
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✅ Naturally mold-resistant – ideal for both indoor and outdoor use
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✅ No primer required – on unpainted, absorbent brick and stone
