Waterborne epoxy primer
1 PRODUCT DESCRIPTION
This series is a high-performance two-component waterborne epoxy environmentally friendly coating formulated with high-grade waterborne epoxy resin, pigments and fillers. It features ultra-low VOC, excellent anti-corrosion and appearance effects, and is an ideal alternative to traditional solvent-based anti-corrosion coatings.
2 RECOMMENDED USE
Widely used on steel structure bridges, port machinery, storage tanks, vehicles and other applications requiring high decoration and strong protection.
3 FEATURES
- Good adhesion.
- Long-lasting corrosion resistance.
- Excellent adhesion to both bare steel substrates and shop primers.
- Good water resistance and mechanical properties.
4 COMPLIED STANDARDS
Complies with HG/T 4759-2014 “Waterborne Epoxy Resin Anticorrosive Coatings”.
5 PHYSICAL PROPERTIES
| Color | Iron red or gray |
| Gloss | No requirement |
| Mixing Ratio | Base/Hardener = 18/3 by weight |
| Specific Gravity | 1.42±0.1 |
| Volume Solids | 48±2% |
| Weight Solids | 60±2% |
| Film Thickness | Dry: 40–60 microns/coat; Wet: 83–125 microns/coat |
| Theoretical Coverage | 0.147 kg/m² at 50 microns |
Practical coverage is variable depending on surface conditions, environment and application method.
6 APPLICATION
| Application Temperature | 5–40℃ |
| Application Condition | Relative humidity shall not exceed 85%. Substrate temperature shall be at least 3℃ above the dew point. |
| Application Methods | Airless spray, air spray, brush and roller |
| Thinner | Water |
| Applied Substrate | Bare steel |
| Coating System | According to the PUNTIUM recommended coating system |
Pot Life
| Temperature | 10℃ | 20℃ | 30℃ | 40℃ |
|---|---|---|---|---|
| Pot Life | 4 h | 4 h | 3 h | 2 h |
Airless Spray
| Nozzle Tip Size | 0.43–0.53 mm |
| Nozzle Pressure | 10–15 MPa |
| Thinning Ratio | 0–10% by volume |
Air Spray
| Nozzle Tip Size | 1.3–1.8 mm |
| Nozzle Pressure | 0.5–0.7 MPa |
| Thinning Ratio | 0–10% by volume |
Brush / Roller
| Dilution Ratio | Adjust according to the construction effect. |
Drying Time (DFT 50 μm)
| Condition | Dry to Touch | Dry to Handle |
|---|---|---|
| 20℃ / 65% RH | 60 min | >6 h |
| 55℃ | 10 min | 60 min |
7 SURFACE PREPARATION
- Remove salt and other water-soluble contaminants with fresh water.
- Remove oil and grease with suitable detergent or solvent in accordance with SSPC-SP 1.
- Remove rust, mill scale and other foreign materials completely by abrasive blasting to achieve ISO Sa 2½ (SSPC-SP 10) or better.
- All coated surfaces must be clean, dry and free from dust.
8 STORAGE
| Storage | Store in dry, cool conditions away from sources of heat and ignition. Containers must be kept tightly closed. |
| Shelf Life | 12 months at 25℃. Subject to re-inspection thereafter. |
9 CAUTIONS
SAFETY PRECAUTIONS
The following measures shall be ensured in all paint applications:
- Avoid skin and eye contact.
- If paint comes into contact with skin, wash with warm water and/or a suitable cleanser. If paint comes into contact with the eyes, flush with copious amounts of water and seek immediate medical attention.
- Ensure good ventilation. Avoid inhalation of spray mist or vapour.
- Application and handling should comply with relevant national regulations. Detailed information is given in the SDS.
DISCLAIMER
The information provided in this manual constitutes the most comprehensive and accurate data currently available to us. As the operating conditions of the product are beyond our control, this information does not constitute any warranty and is solely intended to assist the buyer in product selection. Given that our products and manufacturing processes are continuously evolving, this manual will be updated accordingly. All information herein shall be subject to our confirmation. Before using the product, please ensure that you have the latest version of this manual.
PREPARATION DATE
September 7, 2025
REVISION DATE
February 4, 2026
