FILCO® 394 is a modified epoxy resin meticulously formulated within a non-ionic water emulsion, serving as a film-former in glass fiber sizings. It presents as a milky liquid. Key material features include excellent compatibility, flexibility, good non-yellowing properties, thermal stability, toughness, a high molecular weight, a non-tacky surface, and non-brittle attributes.

Functions: Film Former

Chemical Family: Epoxy & Epoxy Derivatives

Compatible Polymers & Resins: PBT/PET Alloy

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Characteristics of Film
  • Clear, not tacky
  • Tough and flexible film
  • Glass transition temperature Tg ~ 28 °C
  • High thermal stability
  • Not yellowing at high temperature

Applications & Uses

Compatible Polymers & Resins
Compatible Reinforcements
Processing Information

FILCO® 394 is suggested as film former for glass fiber sizes for:

  • Chopped strand mat for thermoplastic matrices


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content55%MA145LFE
Glass Transition Temperature (Tg)86°F-
Epoxy Equivalent Weight1800g/eqMA149LFE
Viscosity (at 25°C, #3, 20rpm)1500 - 5000mPa.sMA143LFE
pH7 - 9-MA148LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size600nmMA147LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions

FILCO® 394 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.Prevent from freezing. Thoroughly homogenize the product before use