Special Functional Coatings
Dachin WR 620
Superhydrophobic coating
Composition
The coating is composed of fluorosilicone resin, pigments, solvents, and additives. The second component is an aliphatic isocyanate curing agent.
Key Characteristics
The film exhibits excellent adhesion, hardness, ultra-high weather resistance, color/finish retention, outstanding chemical resistance, and self-cleaning properties with anti-soiling performance.
Applications
Ideal for high-performance protective and decorative coatings on vehicles, bridges (including concrete structures), construction machinery, and critical infrastructure steel/concrete surfaces.
Technical Specifications
| Film Appearance | Smooth, level finish matching specified color requirements |
|---|---|
| Volume Solids Content (%) | 58±1 |
| Density (kg/L) | 1.47±0.04 |
| Bend Test (mm) | ≤2 |
Packaging Specifications
| Weight (kg) | Volume (L) | |
|---|---|---|
| Component A | 22.47 | 14.4 |
| Component B | 4.03 | 3.6 |
| Total | 26.5 | 18 |
Basic Parameters
| Mix Ratio | Weight Ratio A:B = 5.54:1 |
|---|---|
| Volume Ratio A:B = 4:1 | |
| Pot Life | 5°C: 6h; 15°C: 4h; 25°C: 3h |
| Theoretical Coverage | ~9.6 m²/L (60μm dry film) |
Recoat Intervals
| Temperature (°C) | Surface Dry (min) | Hard Dry (h) | Recommended Recoat Window | |
|---|---|---|---|---|
| Minimum | Maximum | |||
| 5 | 90 | 12 | 12 | 2 days |
| 15 | 60 | 8 | 8 | |
| 25 | 30 | 5 | 5 | |
| 40 | 20 | 4 | 4 | |
Data derived from standard film thickness on steel test panels.
Application Guide
- Dachin WR 620 Superhydrophobic Coating is best applied via airless spray for optimal single-coat film formation efficiency.
- Maintain surface temperature at least 3°C above dew point and below 85% relative humidity during application.
- Ensure adequate ventilation in confined spaces.
- Mix base material and curing agent strictly by ratio before use. Use only prepared quantities within pot life. All mixed coating must be consumed within the specified working period.
- Keep all tools dry and clean before/after application.
- Avoid contact with water, acids, or alkalis during mixing and application. Curing agent containers must be sealed tightly after use to prevent curing blockage.
- Allow full curing for 7 days before final use.
Compatible Coatings
Undercoats: Dachin EP 550 Epoxy Zinc Silicate Intermediate Coat, Dachin EP 100 Epoxy Primer, etc.
Coating Layers
Suggested application: 2 coats for dry film thickness of 60-80μm.
Surface Preparation
Clean substrate surfaces of all contaminants (oil, dust, etc.). Ensure no moisture or condensation on surfaces. For cured polyurethane, fluorocarbon, or epoxy coatings, lightly sand to roughen prior to topcoat application.
Mixing
This two-component product (Component A base, Component B curing agent) requires thorough power tool stirring of each component prior to mixing. Strictly follow mix ratios and re-stir after blending.
Application Methods
| Application Type | Thinner | Dilution (%) | Nozzle Size (mm) | Pressure (MPa) |
| Airless Spray | Dachin Thinner X10 | 0-5 | 0.4-0.5 | 20-25 |
| Conventional Spray | Dachin Thinner X10 | 0-10 | 2-2.5 | 0.3-0.4 |
| Roller/Brush | Dachin Thinner X10 | 0-10 | N/A | N/A |
Dilution calculated by paint weight.