Surface Protection Guide
Waterproof Wall Primer: What Does It Actually Do?
Basic surface priming prepares a wall for paint. A waterproof primer goes further—it helps create a moisture-resistant layer between the substrate and the coating system, offering additional protection against dampness and related coating deterioration.
Common Moisture Sources
Moisture can reach wall surfaces from multiple directions. Understanding the source helps determine whether a waterproof primer is appropriate and whether additional repairs are needed.
- •Rain exposure on exterior walls
- •Cracks in walls or plaster
- •Plumbing leaks
- •Roof or terrace leakage
- •Rising moisture from the ground
- •Condensation
- •Moisture within the substrate itself
24M Primer Premium: Moisture Protection
24M Primer Premium is a high-quality acrylic primer with waterproof, anti-fungal/fungicidal and anti-algal properties. It is designed for both interior and exterior wall applications.
- •Waterproofing properties help protect the coating system against moisture and dampness
- •Anti-fungal/fungicidal properties help resist fungal growth
- •Anti-algal properties help resist algal growth
- •Crack-resistant / crack-bridging formulation
- •Lead-free and Low VOC formulation (<50 g/L)
Before You Apply
If existing fungal or algal contamination is present, clean the surface and ensure proper surface preparation before coating.
Important: Active plumbing leaks, structural water ingress and failed terrace/roof waterproofing must be repaired at source. 24M Primer Premium is a surface coating and does not repair structural defects.
Application
- •Dilute with up to 40% clean water
- •Apply by brush, roller or airless spray
- •Apply 1–2 coats depending on porosity