ASTRA DF®
Silicone Defoamers
Silicone defoamers for effective foam control in various industrial processes. Fast foam destruction, good compatibility, minimal impact on coating clarity.
Why use silicone defoamers?
Foam is one of the most common defects in industrial coatings, leading to pinholes, craters and weak films. Silicone defoamers rapidly destroy foam bubbles thanks to ultra-low surface tension. They work at very low dosages and remain effective across long shelf life.
Key Benefits
- Rapid Foam Destruction — instant defoaming on application
- Low Dosage — economical use 0.1-1%
- Persistent Effect — works during storage and application
- Clarity Preservation — minimal impact on transparent coatings
- Compatible with epoxy, PU, alkyd, polyester systems
- No surface defects when properly dosed
Impact on Coating Performance
ASTRA DF defoamers deliver flawless film formation in high-build coatings, epoxy floors and printing inks. Their broad compatibility reduces formulation development time and protects coating performance.
O – organosoluble, RC – radiation-curable
Product Catalog
Download TDS| Active % | Feature | TDS | |||
|---|---|---|---|---|---|
| ASTRA DF-104 | BYK-A530; BYK 330 | O / RC | 7% | Good conformity, high defoaming rate. Especially suitable for low viscosity epoxy systems. | |
| ASTRA DF-1904 | BYK-019 | WB / RC | 60% | Highly effective silicone oil type defoamer. Particularly suitable for high viscosity systems, eliminates microfoam. Must be added at the dispersion stage. | |
| ASTRA DF-204 | DISPERBYK-141, EFKA 2038, TEGO 962 | O | 3% | High efficiency, good compatibility. Low tendency for paint shrinkage. | |
| ASTRA DF-304 | DISPERBYK-141, EFKA 2038, TEGO 962 | O | 3% | Effective at the production stage, prevents cratering, good compatibility, low tendency to shrinkage of paintwork. Does not affect gloss. | |
| ASTRA DF-504 | BYK-066N, TEGO 931, TEGO 932 | O | 1% | Good compatibility, high efficiency in releasing air from the system and defoaming. Does not affect the transparency of the system. | |
| ASTRA DF-604 | BYK-088 | O / RC | 3% | Good compatibility, high defoaming rate, especially suitable for low viscosity epoxy systems. | |
| ASTRA DF-804 | BYK-085, DC 6800 | O / RC | 100% | High efficiency, good compatibility. Can improve the fluidity of the system. | |
| ASTRA DF-904 | BYK-077 | O | 50% | Effective at the production stage. |
Need technical assistance?
Our team can help you select the right additive for your formulation.
Contact Technical Support