Watermark
Cause
The rain washes dust and dirt accumulated on the roof or the ridge of the wall, then down onto the painted wall. When it dries, the dirt will remain and become embedded in the paint, forming black stains.
Solution
Step 1
Surface preparation
- Scrub and clean the old paint with water and a plastic brush.
- The surface must be completely clean and dry without any dust before painting.
Step 2
Primer
Nippon Paint Excel Primer
- Small molecules give excellent adhesion.
- Fix chalky and powdery surfaces.
Step 3
Topcoat
Nippon Paint Weatherbond
- Durable against harsh weather.
- Excellent UV reflection. Reduce substrate temperature to save energy costs.
- Excellent adhesion and durability for 15+ years.