Afcona - 3238 is an additive designed as a slip and leveling agent that also offers defoaming properties.

Chemical Family: Polysiloxanes

Compatible Polymers & Resins: Acrylics, Alkyds, Epoxies (EP), Polyurethanes (PU)

Features: Defoaming, Good Compatibility

End Uses: 2K (2 component) Coating, Radiation Curable Coating, Solventborne Coating, Solventless & High Solids Coating

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Enhanced TDS

Identification & Functionality

Features & Benefits

CASE Ingredients Features
Product Features

The percent of alkyl modification in Afcona – 3238 falls between that of Afcona – 3236 and Afcona – 3239.

Compared to these products:

  • Afcona – 3238 is best in slip.
  • Afcona – 3238 offers better compatibility than Afcona – 3236.
  • Afcona – 3238 offers better defoaming than Afcona – 3239.

Applications & Uses

Application Method
Compatible Polymers & Resins
Cure Method
Coating End Applications
Product Applications

Afcona-3238 does not stabilize foam, so it is often recommended for the foam-sensitive systems listed below:

  • Solvent–free epoxies
  • High solid or solvent-free polyurethanes
  • Paints applied by curtain coater
  • Paints applied by airless spray application
  • UV curing systems

For matte finish coatings, the addition of Afcona – 3238 will help in the orientation of matting agents. In UV curing systems, this product further reduces gloss when added together with a matting agent.

Addition and Dosage

Afcona-3238 may be added at 0.05 – 0.50% based on total formulation. Under normal conditions, 0.05 – 0.2% based on total formulation is sufficient.


Afcona-3238 may be added at any stage of the production process. However, its defoaming properties require high shear force for proper mixing if it is added in the letdown stage. For easier incorporation, dilute to 10% in any solvent/s.


Physical Form
Transparent to slightly yellowish liquid
ValueUnitsTest Method / Conditions
Colormax. 2--
Active Ingredientsmin. 92%-
Density (at 20°C)0.92 - 0.94g/cm³-
Refractive Index1.427 - 1.437--
Flash Pointmin. 100°C-

Regulatory & Compliance

Certifications & Compliance
Chemical Inventories

Packaging & Availability

Packaging Information

55 lb and 397 lb non-returnable containers.

Storage & Handling

Shelf Life
5 years
Storage Condition

Afcona-3238 should be stored in a cool, dry place.