How should a surface be prepared before applying a PU coating?

Initial Cleaning and Assessment

Begin by thoroughly cleaning the surface to be coated. Remove any dust, dirt, oils, grease or loose particles, as these contaminants can impact the bond between the coating and the substrate. For best results, use a mild detergent and water, then dry the area completely. Inspect for cracks, old flaking paint or wear; these should be repaired or removed before proceeding.

Preparing for Maximum Adhesion

The surface must be completely dry and free of moisture prior to PU application. If working on glossy tiles or metal, lightly abrading the surface with fine sandpaper will help the coating grip better. For porous substrates such as concrete, ensure all debris is cleared away, and consider using a primer if recommended by your chosen product, such as Prolux PU coating.

Practical Tips for Application

• Always follow the manufacturer’s preparation and mixing instructions for two-component PU systems.
• Mask surrounding areas or use surface protectors like the Protective Sheet Film to avoid spills.
• Work in a well-ventilated space and ensure the temperature is within product guidelines for curing.