What You’ll Need

• “Epoxyprimer” – Universal Water-Based Two-Component Epoxy Floor Primer: A water-based primer promoting adhesion and durability for various substrates in epoxy resin flooring.
• “Ebonite Abralon” – Sanding Pads 360-4000 Grit for Resin and Wood: Pads designed for detailed sanding and polishing of epoxy resin and wood surfaces.
• Dry Sanding Discs Kit 150mm – Assorted Grits for Resin and Wood: A set of 150mm dry sanding discs in varied grits designed for sanding resin and wood surfaces.
• “EpoxyWood” – Wood Restoration Epoxy Resin for Deep Penetration and Waterproofing: A wood restoration epoxy resin designed for deep penetration and complete waterproofing.
• Vacuum cleaner or broom
• Protective gloves, dust mask, and goggles
• Microfibre cloths

See Surface Preparation in Action

Proper surface prep underpins every successful resin floor project. These images showcase expertly sanded and primed surfaces, setting the stage for smooth and durable resin finishes.

Step 1: Assess the Surface and Remove Debris

Start with a clean baseline for adhesion. Before any sanding, remove existing coatings, paint, or dirt from the floor. Sweeping and vacuuming ensure no debris will get in the way during sanding or resin application. Check for oil or grease, which should be treated with suitable degreasers.

For wooden surfaces, inspect for structural damage or moisture. Concrete or screeds should be dry and stable. This careful assessment prevents issues like bubbling or poor adhesion later in the process.

Step 2: Sand the Floor to Create a Mechanical Key

Choose sanding grit based on current surface. For raw concrete or screed, use a medium to coarse grit (such as P80 or P120) from the Dry Sanding Discs Kit 150mm – Assorted Grits for Resin and Wood to even out imperfections and provide enough roughness for the primer and resin to bond effectively.

For already smooth or previously finished resin floors, fine sanding is sufficient. Opt for higher grits (P600 or above) from the same kit or a finishing pad such as the “Ebonite Abralon” – Sanding Pads 360-4000 Grit for Resin and Wood. Sanding ensures mechanical key, which is critical for adhesion. Always move in circular motions and avoid excessive pressure to prevent gouges or uneven areas.

For wooden substrates, sanding is even more important. Sanding opens up the wood grain, enhancing deep penetration when using a restoration resin such as “EpoxyWood” – Wood Restoration Epoxy Resin for Deep Penetration and Waterproofing.

Step 3: Clean Thoroughly After Sanding

Check for a dust-free finish before priming. After sanding, all dust and particles must be removed using a vacuum and a damp microfibre cloth. Even tiny dust residues can affect how primers and resins adhere, causing defects or weak spots in the final floor.

Always allow the surface to fully dry before moving to the next step. Skipping this crucial clean-up can compromise the integrity and longevity of your resin floor treatment.

Step 4: Apply a Suitable Primer

Priming maximises resin bond. The prepared surface is now ready to be primed for resin application. For most substrates—including tiles, screeds, concrete, and wood—a high-quality primer like the “Epoxyprimer” – Universal Water-Based Two-Component Epoxy Floor Primer is recommended. This universal epoxy primer ensures strong adhesion and helps to seal porous surfaces prior to resin pouring.

Follow application guidelines, allowing appropriate curing time (usually 24–48 hours), before proceeding to pour or coat with your chosen resin system. Proper priming reduces the risk of delamination and improves the aesthetic and functional performance of the floor.

Tips, Common Mistakes, and Troubleshooting

Rushing the sanding process or skipping it entirely can lead to peeling, bubbles, or patchy adhesion. Always choose the appropriate grit for each stage—start coarser, progress to finer, and never ignore cleaning between stages. Too much pressure during sanding may damage timber or create uneven patches in resin or concrete. Wear protective gear throughout to avoid inhaling dust or contacting chemicals, and always let each layer dry or cure fully before continuing to the next.

Before and After: Sanding for Resin Floors

Effective sanding makes all the difference. Compare untreated versus sanded substrates—you’ll see instantly why preparation is vital for flawless results when applying resin flooring systems.