Dispersions, Resins and Additives, North America
Defoamer additive

EFKA® SI 2025

Silicone-based defoamer for physically drying systems and air-drying alkyds.

EFKA® SI 2025 is a silicone-based defoamer for solvent-based coatings. It prevents the formation of foam and blisters during manufacturing and application. This product is used for air drying systems based on acrylic, vinyl or chlorinated polymers, fast drying industrial and decorative finishes and airless spray coatings.

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Product selection guide - Additives
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Material safety datasheet (United States - Spanish)
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Material safety datasheet (United States - English)
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Material safety datasheet (Canada - French)
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Country: Canada Language: French
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Material safety datasheet (Canada - English)
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Country: Canada Language: English
Technical datasheet
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Located outside of North America? Visit our global website here.


Notice Under California Consumer Privacy Act (“CCPA”)
Please be aware that by registering with BASF to learn more about products and services, making purchases, or initiating other business transactions with BASF, BASF will be collecting certain personal information about you and your internet activity for specific business purposes. For a description of the information collected about you and the business purposes for which that information is used, please click here: Table III Data Collection Purpose. For further information about BASF’s overall data privacy practices, please review BASF’s Privacy Policy, which may be accessed here: https://www.basf.com/us/en/legal/data-protection.html