Floor Paint Troubleshooting

Peeling occurs when the coating cannot bond to the substrate. Common causes include laitance, previous sealers, smooth powerfloated concrete or insufficient mechanical preparation.

All failed coating must be fully removed by grinding or shot blasting. The surface must then be properly prepared before reapplying a suitable primer and coating system.

No. Any loose or poorly bonded coating will continue to fail. All weak material must be removed back to a sound substrate before recoating.

Yes. Powerfloated or dense concrete prevents penetration and adhesion. Mechanical preparation is required to open the surface profile.

In most cases, yes. A suitable primer improves adhesion, especially on porous or previously prepared substrates.

Bubbling usually occurs when moisture or air is trapped beneath the coating during curing. This is common on damp concrete or when coatings are applied too thickly.

Yes. Moisture vapour rising through the slab creates pressure, causing the coating to lift and form blisters.

Remove all affected areas, allow the substrate to dry if possible, and apply a moisture-tolerant or breathable system if damp cannot be eliminated.

Yes. High temperatures can cause rapid curing, trapping air or solvent and leading to bubbling.

No. Blistered coatings must be removed before recoating, otherwise failure will continue.

Yes. Oil contamination blocks adhesion and will cause coating failure if not fully removed.

Use a heavy-duty degreaser and repeat cleaning if required. In severe cases, mechanical preparation may still be needed after cleaning.

Only if it is clean and properly prepared. Any oil, tyre residue or previous coatings must be removed or stabilised.

The coating will fail prematurely, often peeling or lifting in contaminated areas.

Not fully. Pressure washing helps, but chemical degreasing is required to break down embedded contaminants.

Dusting is caused by weak surface laitance or poor curing. The top layer of concrete breaks down under use.

No. Dust prevents adhesion. The surface must be mechanically prepared and stabilised before coating.

Grind or remove the weak surface layer, then apply a suitable primer or sealer to stabilise the substrate.

Flaking is often due to poor surface strength, moisture damage or freeze-thaw cycles.

Yes. A penetrating primer helps bind the surface and improve coating adhesion.

Standard coatings should not be applied to damp concrete. Moisture can cause blistering and adhesion failure.

Common signs include dark patches, condensation or previous coating failure. Moisture testing provides a more accurate assessment.

The coating may blister, peel or fail prematurely due to pressure from moisture vapour.

Yes. Moisture-tolerant or breathable systems are designed for substrates where damp cannot be fully eliminated.

Not always. Moisture can still rise through the slab unless a proper damp-proof system is used.