I. Overview of Epoxy Floor Paint
Epoxy floor paint is a two-component floor coating based on epoxy resin, which forms a hard and dense film after curing. It is widely used in industrial plants, underground parking lots, laboratories, commercial spaces, and other locations. Depending on usage requirements, there are various types, including epoxy thin-coat, epoxy self-leveling, epoxy mortar, and epoxy anti-static coatings.
II. Standard Construction Process
Step 1: Substrate Inspection and Treatment
Inspect the concrete substrate for strength (≥C25), flatness (2m straightedge ≤3mm), moisture content (≤8%), and surface condition. Remove laitance, oil stains, old coatings, etc. Repair cracks and holes.
Step 2: Substrate Grinding
Use a floor grinder to thoroughly grind the substrate, removing surface laitance, increasing roughness, and improving primer adhesion. After grinding, use an industrial vacuum cleaner to thoroughly clean the dust.
Step 3: Epoxy Primer Application
Mix the A and B components of the epoxy primer in proportion and stir evenly. Apply evenly using a roller or trowel. The primer penetrates the concrete capillaries, sealing and reinforcing the substrate while providing a bonding layer. The dosage is approximately 0.15–0.2 kg/m².
Step 4: Mortar/Putty Layer
Based on design requirements, use epoxy mortar (with quartz sand) or epoxy putty (with quartz powder) for leveling and repairs. The mortar layer increases the floor thickness and compressive strength.
Step 5: Epoxy Intermediate Coat
The epoxy intermediate coat further smooths the surface, increasing coating thickness and overall strength. After application, use a trowel to level it.
Step 6: Epoxy Topcoat Application
The topcoat serves as the final decorative and protective layer. For self-leveling topcoats, use a trowel; for thin-coat topcoats, use a roller. Ensure uniform thickness during application to avoid color differences. The dosage is approximately 0.8–1.2 kg/m² (for self-leveling).
Step 7: Curing
After construction, the floor must be cured for at least 7 days before normal use. During curing, avoid water immersion, heavy loads, and contact with chemicals. At an ambient temperature of 25°C, the floor can be walked on after 24 hours, bear light loads after 72 hours, and fully cure after 7 days.
III. Common Issues and Prevention
| Issue | Cause | Prevention |
|——–|——–|————|
| Peeling and detachment | High substrate moisture content, insufficient primer penetration | Ensure the substrate is dry, thoroughly grind, and apply sufficient primer |
| Bubbles and pinholes | Rapid mixing, high temperature | Mix at low speed, choose appropriate construction time |
| Color difference | Different batch numbers, long construction intervals | Use materials from the same batch, apply continuously |
Related Reading
– Guardian of High-Load Environments: A Guide to Selecting and Applying Industrial Epoxy Floor Paint
– The Powerful Role and Professional Construction Process of Floor Paint
– How to Choose Floor Paint? One Article to Make It Completely Clear
– How to Choose Floor Paint? From Home to Factory, a Full-Scene Professional Guide