Preventing Peeling or Blistering in Floor Paint

Prepare the substrate properly

Loose paint, dust, oil and old sealers stop a new coating from bonding. Start by scraping away anything that is already flaking or unstable. A sharp, heavy-duty scraper can remove failed paint and thin residues before you clean the surface with a suitable degreaser.

After cleaning, allow the floor to dry fully. On concrete, trapped water vapour is a common cause of blisters in many floor paint systems, so damp areas need particular care.

• Scrape away loose or flaking paint
• Degrease oily patches
• Repair cracks and friable areas
• Let the surface dry completely

Use a compatible primer

A primer is not an optional extra when adhesion is uncertain. A water-based two-component epoxy primer such as Epoxyprimer is designed to improve bonding on concrete, wood, tiles and screeds. The right primer evens out absorbency and gives the topcoat a more reliable base.

Follow the product’s recoat and curing guidance before moving on to the topcoat. Rushing this stage is one of the most common causes of lifting and peeling later.

Allow every layer to cure fully

Applying the next coat too early traps solvent or moisture, which can form bubbles and weaken the bond. Check the recommended recoat window and full cure time before adding another layer. For a demanding floor, a two-component polyurethane topcoat can provide a tougher finish, but it still relies on a clean, cured base.

Thin, even coats generally cure more predictably than one very thick application. If conditions are cool or humid, allow extra time rather than forcing the schedule.