Abstract
This 18-month study compared the mould prevention efficacy of water-based and oil-based sealers across laboratory conditions and 60 field installations. Oil-based sealers showed 23% better moisture barrier properties but 40% higher VOC emissions and longer cure times. Water-based antimicrobial sealers demonstrated equivalent mould resistance with better environmental and health profile.
Comparative Results
| Property | Water-Based | Oil-Based |
|---|---|---|
| Moisture barrier (MVTR) | Good (15 g/m²/day) | Excellent (12 g/m²/day) |
| Mould resistance (18 months) | 92% effective | 94% effective |
| VOC emissions | Low (<50 g/L) | High (350+ g/L) |
| Cure time | 2-4 hours | 24-48 hours |
| Recoatability | Excellent | Fair |
| Cost (per sqm) | $8-12 | $10-15 |
Recommendations
- Occupied spaces: Water-based antimicrobial sealers (low VOC, fast cure)
- Severe moisture areas: Oil-based for maximum moisture barrier
- Renovation projects: Water-based for faster room turnover
- Health-conscious: Water-based with antimicrobial additives