FILCO® 8890 is an epoxy resin available as a milky liquid in a non-ionic water emulsion. Primarily used as a film-former in glass fiber sizings, it's tailored for applications demanding highly soft film characteristics. Its key attributes include being a pure epoxy resin, possessing a narrow particle size distribution, exhibiting hydrolysis and sedimentation stability, and showcasing the high mechanical shear stability of the diluted emulsion.

Functions: Film Former

Chemical Family: Epoxy & Epoxy Derivatives

Compatible Polymers & Resins: Epoxies (EP), Phenolic Resins, Unsaturated Polyester (UPE)

Processing Methods: Filament Winding, Pultrusion

Technical Data Sheet

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Identification & Functionality

Chemical Family
Composite Materials Functions
Product Families

Features & Benefits

Materials Features
  • Pure epoxy resin
  • Epoxy equivalent around 280 g/eq
  • Narrow particle size distribution
  • Hydrolysis and sedimentation stability from pH 2 to 12: min 48 hours
  • High mechanical shear stability of the diluted emulsion
Characteristics of Film
  • Clear
  • Tacky
  • Compatible with unsaturated polyester, epoxy, phenolic matrices
  • Quickly soluble in styrene

Applications & Uses

Compatible Polymers & Resins
Compatible Reinforcements
Composites Processing Methods
Processing Information

FILCO® 8890 is suggested as film former for glass fiber sizes for:

  • Filament winding roving
  • Pultrusion roving
  • Weaving roving


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C, #3, 20rpm)1500 - 2500mPa.sMA143LFE
Solid Content52 - 56%MA145LFE
pH6 - 7.5-MA148LFE
Epoxy Equivalent Weight (on dry resin)260 - 310g/eqMA149LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size200 - 700nmMA147LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions

FILCO® 8890 should be stored in closed containers away from direct sun rays, at temperature between +5 and +30°C. In these conditions maximum suggested storage time is 6 months from production, in the original package. After that date product must be rechecked. Like all epoxies, FILCO® 8890 could crystallize at temperature below 10°c; in case it happens, product must be conditioned under stirring at temperature of 42-45°C to restore all original characteristics