Water based Polyurethane Primer
1 PRODUCT DESCRIPTION
This is a two‑component coating formulated with water‑borne polyurethane resin and high‑grade pigments and fillers.
2 RECOMMENDED USE
Widely applied for steel‑structure bridges, port machinery, storage tanks, vehicles and other projects requiring high‑grade decoration and heavy‑duty protection.
3 FEATURES
‑ Environmental‑friendly and safe. ‑ Excellent weather resistance and durability. ‑ Outstanding physical and chemical performance. ‑ Good decorative effect and convenient application. ‑ Good compatibility with supporting coating systems.
4 COMPLIED STANDARDS
Complies with HG/T 4761‑2014 Waterborne Polyurethane Coatings.
5 PHYSICAL PROPERTIES
Item | Parameter |
Color | Various colors |
Gloss, GU@60° | 60 |
Mixing Ratio | Base / Hardener = 20 / 1.7 (by weight) |
Specific gravity, g/cm³ | 1.44±0.1 |
Volume Solids, % | 49±2% |
Weight Solids, % | 51±2% |
Film thickness | Dry film: 30‑50 microns / coat |
Theoretical Coverage | 0.118 kg/m² at 40 microns dry film |
Practical coverage varies depending on surface condition, ambient environment, application method and other factors.
6 APPLICATION
Item | Details |
Application Temperature | 5℃‑40℃ |
Application Condition | Relative humidity ≤85%. |
Pot life | 3 hrs @10℃; 3 hrs @20℃; 2 hrs @30℃; 1 hr @40℃ |
Application Methods | Airless spray, air spray, brush, roller |
Airless spray | 0.38 ~ 0.53 mm |
Air spray | 1.3 mm‑1.7 mm |
Brush / Roller | Adjust dilution ratio according to application effect |
Thinner | Water |
Drying time (DFT:50 μm) | • 25 ℃ @50%RH: Dry to touch 30 min; Dry to handle ＞4 hrs |
Applied substrate | Bare steel |
Coating system | Follow PUNTIUM recommended coating system |
7 SURFACE PREPARATION
‑ Remove salt and other water‑soluble contaminants with fresh water. ‑ Eliminate oil and grease in accordance with SSPC‑SP 1 Solvent Cleaning standard. ‑ Remove rust, mill‑scale and foreign substances completely by abrasive blasting to achieve ISO Sa2 1/2 (SSPC‑SP 10) or higher grade. ‑ Ensure all surfaces to be painted are clean, dry and dust‑free prior to application.
8 STORAGE
Item | Specification |
Storage Condition | Store in dry, cool conditions, and away from sources of heat & ignition. Containers must be kept tightly closed. |
Shelf life | 12 months at 25 ℃. |
9 CAUTIONS
SAFETY PRECAUTIONS
The following measures shall be ensured in all paint applications. ‑ Ensure good ventilation. Avoid inhalation of spray mist or vapour. ‑ Application and handling of this product should be in compliance with relevant national regulations. Detailed 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: 2024‑09‑02 REVISION DATE: 2026‑02‑04
