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ASTRA WA®
Wetting Agents
Substrate wetting agents. Significantly reduce surface tension, prevent craters, improve flow and leveling. Some grades also have defoaming properties.
Why use substrate wetting agents?
When a coating cannot properly wet the substrate, it forms craters, fisheyes and dewetting defects. Wetting agents dramatically lower surface tension so the coating spreads evenly across difficult substrates like plastics, metals contaminated with oil, and low-energy surfaces.
Key Benefits
- Significant surface tension reduction
- Crater and fisheye prevention
- Better flow and leveling on difficult substrates
- Some grades also defoam
- Compatible with solvent, water and UV systems
- Improves edge coverage on sharp features
Impact on Coating Performance
ASTRA WA agents eliminate the most frustrating defects on contaminated or low-energy substrates. The result: cleaner finishes, lower reject rates and higher production yields.
O – organosoluble, WB – water-based, RC – radiation-curable
Product Catalog
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| Active % | Feature | TDS | |||
|---|---|---|---|---|---|
| ASTRA WA-1003 | BYK-345 | Water-based / Radiation-curable | 100% | Provides excellent substrate wetting and leveling for water systems. Stable in water, does not cause foam. | |
| ASTRA WA-103 | Surfynol-104E | Water-based | 50% | Suitable for water systems, excellent substrate wetting, works as a defoamer, influences chemical surface tension. | |
| ASTRA WA-1803 | Tego-270 | Solvent-based / Water-based / Radiation-curable | 100% | Reduces the surface tension of the system, ensures wetting of the substrate, does not stabilize the foam. | |
| ASTRA WA-1903 | Tego-240 | Water-based / Radiation-curable | 100% | Provides excellent substrate wetting and leveling for water systems. Stable in water, does not cause foam. | |
| ASTRA WA-2003 | Tego-260 | Solvent-based / Water-based / Radiation-curable | 100% | Suitable for water-based and UV-curable systems. Provides rapid leveling, significantly reduces surface tension, does not affect sliding, perfectly wets the substrate. | |
| ASTRA WA-2103 | Tego-265 | Solvent-based / Water-based / Radiation-curable | 100% | Suitable for water and organosoluble systems. Perfectly wets the substrate, prevents the formation of | |
| ASTRA WA-2203 | Tego-280 | Solvent-based / Water-based / Radiation-curable | 100% | Suitable for water-based and organosoluble systems. Perfectly wets the substrate, prevents crater formation, does not affect sliding. | |
| ASTRA WA-2303 | DO-75，OT-75 | Water-based | 100% | Affects adynamic surface tension, highly hydrophilic, prevents cratering, improves levelling, does not affect slip, does not stabilise foam. | |
| ASTRA WA-2603 | Tego-245（Evonik） | Solvent-based / Water-based / Radiation-curable | 100% | Suitable for water and UV curing systems. Significantly reduces surface tension, provides leveling, does not affect sliding, works in the pH range of 6 -8. | |
| ASTRA WA-2703 | Surfynol-604 | Water-based | 100% | Affects adynamic surface tension, highly hydrophilic, prevents cratering, improves levelling, does not affect slip, does not stabilise foam. |
Showing 1-10 of 22 Products
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