Apply New Products Over Existing Microcement
Whether you’re future-proofing a new design or looking to apply an alternative coating to an existing microcement installation, it is essential to understand how this unique surface interacts with other materials.
Because microcement is finished with a protective, non-porous sealer, applying new layers—such as paint, tile adhesive, or alternative coatings—requires specific preparation. This guide explains how to identify your current finish and the steps needed to ensure your new building materials bond perfectly.
Can I Apply New Products Over Existing Microcement?
If your microcement installation is complete, the surface will have a polyurethane sealer protecting it. Before applying any new coatings, paints, or finishes, follow these troubleshooting steps to ensure a successful bond:
Verify Compatibility
Always contact the manufacturer of the product that you intend to apply. Ask specifically if their product can be applied onto a polyurethane finish. This is a critical step, as some products may not adhere to non-porous surfaces, like polyurethane.
Check for Primers
Ask the manufacturer if a specific adhesion primer is required. Using the correct primer can often bridge the gap between the polyurethane sealer and your new coating.
Sanding & Removal
If the new product is incompatible with polyurethane, you must use an abrasive sander to completely remove the sealer layer. Once the sealer has been removed, you will reach the raw, cement-based surface. You should then confirm with your manufacturer if their product is suitable for application directly onto cement-based surfaces.
Paint Considerations
While many vinyl-based paints can be applied over polyurethane, results vary significantly by brand. Always double-check the technical data sheet or contact the brand’s support team before purchasing or starting your application.