1. Material Requirements: Use Bio-based Polyurethane Flooring Coating, including primer, intermediate coat, topcoat, and compatible aggregates. Suitable for logistics warehouses, food processing plants, and similar facilities, with chemical resistance and impact resistance.

2. Substrate Conditions: The concrete substrate shall be at least 7 days old, have adequate hardness, and a flat surface. The moisture content shall be ≤9%. The surface must be free of dust, oil, and cracks; any holes or depressions shall be repaired and leveled. Application is possible in low‑temperature environments down to 10 °C.

3. Application Environment: The ambient temperature must be above 10 °C. Provide good ventilation. The construction area must be fully enclosed and protected to prevent cross-trade interference (cross-construction).

1. Substrate Inspection and Preparation: Inspect the floor for hardness, moisture content, and flatness. Treat the surface using shot blasting or dust‑free grinding to remove loose laitance and improve adhesion. Repair cracks and holes, then sand smooth.

2. Apply Primer: Apply a high‑performance primer by trowel or roller, ensuring uniform coverage and adequate penetration. Drying time shall follow the product instructions, typically at least 6 hours.

3. Apply Intermediate Coat: Mix the intermediate coating material with an appropriate amount of quartz sand, stir evenly, and apply by trowel. After curing, sand to remove dust. Then, mix the intermediate coating with quartz powder and apply two coats of putty. Sand and remove dust after each coat to ensure a flat surface.

4. Apply Topcoat: Apply the first coat of topcoat by roller or trowel. After drying, sand and remove dust. Apply the second coat of topcoat evenly, free from brush marks or sagging. During application, avoid water spills and contact with solvents.

5. Curing of Finished Floor: After application, protect the finished floor from traffic and damage. Pedestrian access may be allowed after 8 hours of curing. Light vehicle traffic may be permitted after 24 hours. Full curing requires 48 hours (extend this period in low‑temperature conditions). Normal use can begin after 72 hours.

The finished surface shall be flat, smooth, and uniform in color, with no bubbles, pinholes, or cracks. Adhesion shall be strong, and the floor shall meet the specified requirements for compressive strength, impact resistance, and chemical resistance. Flatness shall be in accordance with the design specifications, with no noticeable unevenness.