Waterborne special epoxy primer
1 PRODUCT DESCRIPTION
This series of products is a high-performance two-component waterborne epoxy environmentally friendly coating formulated with high-grade waterborne epoxy resin and 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
It is widely used in scenarios such as steel structure Bridges, port machinery, storage tanks, and vehicles that require high decoration and strong protection.
3 FEATURES
- Good adhesion.
- Long-lasting corrosion resistance.
- Exhibits excellent adhesion to both bare steel substrates and shop primers.
- Good water resistance and mechanical properties
4 COMPLIED STANDARDS
Complies with the standard HG/T 4761-2014 “Waterborne Polyurethane Coatings”
5 PHYSICAL PROPERTIES
| Item | Specification |
|---|---|
| Color | Gray |
| Gloss, GU@60° | No requirement |
| Mixing Ratio | Base/Hardener = 17/2 (by weight) |
| Specific gravity, g/cm³ | 1.32±0.1 |
| Volume Solids, % | 49±2% |
| Weight Solids, % | 60±2% |
| Film thickness | Dry: 40–60 microns/coat Wet: 82–122 microns/coat |
| Theoretical Coverage | 0.135 kg/m² / 50 microns Practical: Variable on surface conditions, environment, application method, etc. |
6 APPLICATION
Application Temperature: 5℃-40℃
Application Condition: The relative humidity of the air should not greater than 85%.
The substrate temperature is 3℃ higher than the dew point.
Pot life:
| Temperature (℃) | 10 | 20 | 30 | 40 |
| Pot life (hrs) | 4 | 4 | 3 | 2 |
Application Methods: Airless spray, Air spray , Brush and roller
Airless spray
| Nozzle tip size | 0.43~ 0.53mm |
| Nozzle pressure | 10-15 Mpa |
| Thinning ratio | 0-10% by volume |
Air spray
| Nozzle tip size | 1.3mm-1.8mm |
| Nozzle pressure | 0.5-0.7MPa |
| Thinning ratio | 0-10% by volume |
Brush/Roller
| Dilution ratio | Adjust the dilution ratio according to the construction effect. |
Thinner: Water
Drying time & Overcoating interval:
| DFT：50μm | Dry to touch | Dry to handle |
| 20℃ @65%RH | 60min | >6hrs |
| 55℃ | 10mins | 60mins |
Applied substrate: Bare steel.
Coating system: According to the coating system PUNTIUM
7 SURFACE PREPARATION
- Remove salt and other water-soluble contaminants by fresh water.
- Remove oil and grease with suitable detergent or solvent(SSPC-SP 1).
- Remove rust, mill-scale and other foreign materials completely by abrasive blasting to achieve ISO Sa2 1/2(SSPC-SP 10) or better.
- All coated surface must be clean, dry and free from any dust.
8 STORAGE
Store in dry, cool conditions, and away from sources of heat & ignition. Containers must be kept tightly closed.
Shelf life: 12 months/25℃
Shelf life：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 suitable cleanser. If paint comes into contact with the eyes, flush with copious amount of water and seek immediate medical attention.
Ensure good ventilation. Avoid inhalation of spray mist or vapour.
Application and handling of this product should be in compliance with relevant national regulations. Detail information is given on 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: 2024-03-24
REVISION DATE: 2026-02-04
