Why clean before painting or protecting?
A good application starts before the container is opened.
Editorial team · 5 October 2026 · Practical guide
Remove barriers to contact
Dirt, grease, dust and residues can impair product contact with the substrate. Cleaning must suit the surface and coating. A clean appearance does not always prove the absence of contaminants.
Clean without causing damage
Choose the method recommended for the material. Aggressive shingle cleaning can dislodge granules. Do not transfer a concrete or metal cleaning method to a roof without verifying suitability.
Rinse and allow drying
Where rinsing is required, remove cleaner residue before application. Follow drying, acceptable moisture and system instructions. Read the cleaner and coating data sheets together.
Frequently asked questions
Why clean a surface that looks clean?
Dust, residue and old finishes can impair adhesion or penetration without being obvious. Cleaning should suit the substrate and subsequent treatment. Appropriate rinsing and drying are part of preparation.
Can the same washing pressure be used everywhere?
No. Aggressive methods may damage material or force water into roof details. Follow substrate manufacturer instructions. For roofs, have a professional assess the method and access safety.
This guide separates general principles from manufacturer claims. Product data submitted by Zinox was also reviewed. No independent comparative test results were provided.
Zinox — Manufacturer documentation; product-specific statements ↗