RT8421 Balanced Compatibility Defoamer for Coatings
RT8421 is a pre-emulsified defoamer with 100% active ingredient. This product is suitable for architectural coatings, water-based industrial paints, emulsion polymerization, water-based wood coatings, adhesives, and the printing industry.
- A good balance between defoaming efficiency and compatibility.
- It applies to many aqueous systems.
Why Compatibility Matters More Than Foam Elimination
The best defoaming agent is not always the one with the strongest defoaming effect. Aggressive defoamers may affect coating compatibility and cause other problems. The best approach is to balance foam control with good dispersion, film appearance, and formulation stability.
Celotech Ruico defoaming agent RT8421 is designed to provide this balance. It can help you control foam and ensure compatibility with the overall coating system at the same time.
RT8421 Defoamer TDS
- Technical Data Sheet
| Chemical composition | Mineral oil defoamer |
| Active content | approximately 100% |
| Appearance | Colorless to pale yellow opaque liquid |
| Specific gravity (25°C) | 0.8-1 g/ml |
Balanced Compatibility Defoamer Directions for Use
- Recommended amount is 0.1-0.5% of the total formulation.
- 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.
Advantageous Applications of RT8421 Defoamer
RT8421 defoaming agent can be used in water-based polymer emulsion systems. It can help manage foam introduced during agitation, circulation, and processing. Simultaneously, it can maintain compatibility with the aqueous polymer system.
RT8421 defoamer is good at controlling significant amounts of air during intensive mixing of the two components. It can help you balance defoaming efficiency and compatibility, preventing surface defects and ensuring application properties.
RT8421 defoamer agent is suitable for waterborne adhesives that require stable foam control during mixing, transfer, and coating. It helps minimize entrapped air and is designed to reduce the risk of negative effects on bonding performance, storage stability, or final appearance.
Packaging and Storage
- Two packaging specifications: 25kg and 180kg per drum.
- Custom packaging is also supported.
- Keep closed in cool and dry areas, away from direct sunlight and control the temperature around 5°C to 35°C.
- The validity period is 12 months.
Download the TDS or Contact Our Experts for a Customised Formulation
FAQ About RT8421
The HS code is 3910000000.
No, RT8421 and our other defoamer models will not affect the coatings’ color and transparency.
Yes, we have rich experience in exporting our products to European countries, the Middle East, Africa, and American countries.
Our mineral oil defoamer RT8421 has good stability during storage, which has low risks of phase separation or oil floating. We can provide samples for you to test with your system.
Yes, our defoamer RT8421 is generally compatible with HEC (hydroxyethyl cellulose) thickened systems and can be used in most water-based formulations.
