RT9030W Silica Polyether Modified Defoamer for Clear Varnish
RT9030W is an emulsion-type defoamer based on polyether-siloxane technology; it is particularly suitable for clear coats, offering excellent compatibility as well as highly efficient and balanced performance.
RT9030W Modified Defoamer TDS
- Technical Data Sheet
| Chemical composition | Polyether-siloxane copolymer emulsion. Contains fumed silica |
| Active content | 30%±2 |
| Appearance | White, opaque liquid |
| Density | 0.98-1.08 g/cm³ |
| Recommended amount | 0.1-1.0% of the total formulation |
| Usability | |
| Usable | Water-based, add during paint mixing |
| Unusable | Oil-based, two-component, 100%, radiation-curing, added during grinding |
| Solubility | |
| For stability reasons, it is not recommended to dilute the emulsion with organic solvents. | |
Usage Instructions
- The specific dosage should be adjusted by the customer according to actual conditions.
- Freezing should be avoided, and the product must be thoroughly stirred or shaken before use.
Applying Recommendations
- ●○○○ Airless spraying
- ●●●○ Compressed air spraying
- ●●●○ Flexographic and gravure printing
- ●●●● Brush application/roller application
- ●●○○ Self-leveling
- ●●●● Immersion, flow coating, spray coating
Usage Instructions
- Before use, stir briefly with a small shear force.
- The long-term efficacy of the product depends on its specific formulation, and individual formulations should be tested separately.
RT9030W Modified Defoamer Typical Application
RT9030W is well suited for water-based wood coatings and clear varnish systems where appearance is highly sensitive. Its excellent compatibility helps remove foam and microbubbles during mixing and application, supporting a smoother, clearer film with lower risk of pinholes, craters, or haze.
In plastic coatings, RT9030W helps control foam without damaging surface appearance in sensitive formulations. Its balanced defoaming and compatibility support spray and flow processes, helping the coating level more evenly while reducing microbubbles, pinholes, and other visible surface defects.
For laminate coatings, RT9030W offers reliable foam control in systems requiring clean appearance and stable film formation. It helps reduce entrapped air and microfoam during mixing or coating, so the final surface stays smoother, more uniform, and less prone to craters and visual defects.
RT9030W can also be used in traffic coating systems where stable defoaming matters. With good compatibility in water-based formulations, it helps reduce foam generated in production and coating, improving film uniformity and lowering the risk of pinholes, bubbles, and surface imperfections.
Package and Storage
Store in a dark place, keep unopened, and store at 5°C to 35°C. The product has a shelf life of 12 months from the date of production.
25 kg per barrel, with customized packaging for customers.
Download the TDS or Contact Our Experts for a Customized Formulation
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FAQ About RT9030W
Silica polyether-modified defoamer RT9030W suits clear, defect-sensitive varnish systems. But defoaming agent RT9202W is broader for aqueous formulations, especially for diammonium and low-viscosity systems.
Yes, our polyether-modified defoamer RT9030W can remove both visible foam and microbubbles.
Yes, this polyether-based defoamer works for clear and transparent coatings where high compatibility and low risk of surface defects are critical.
RT9030W is suitable for clear and high-finish waterborne coatings where appearance, transparency, and stable defoaming are important.
Yes. It should be tested with the full additive package to confirm overall compatibility and stable performance in the final formulation.
It can be screened at different stages, such as grinding or let-down, depending on where foam is most difficult to control.
