FILCO® 368 is a saturated polyester resin in a non-ionic water emulsion, functioning as a plasticizer in sizing glass fiber. It appears as a milky liquid with main product characteristics such as medium-low molecular weight, non-ionic emulsion, narrow particle size distribution, and excellent compatibility with both polyester and PVAC emulsions.

Functions: Film Former, Plasticizer

Chemical Family: Polyesters

Technical Data Sheet

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Identification & Functionality

Chemical Family
Composite Materials Functions

Features & Benefits

Product Characteristics
  • Saturated polyester with medium-low molecular weight.
  • Non ionic emulsion.
  • Narrow particle size distribution.
  • Excellent compatibility with both polyester and PVAc emulsions.

Applications & Uses

Compatible Reinforcements

FILCO® 368 film-formers for panel roving dispersion epoxy-ester in non-ionic water dispersion
Application characteristics

  • soft films, quickly soluble in styrene
  • quick impregnation
  • high translucency
Processing Recommendations

FILCO® 368 is suggested as plasticizer for::

  • Sizes based on Polyester and PVAc emulsions.
  • PVAc emulsion binder for glass mat.


Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content60.0%-
Glass Transition Temperature (Tg)-40°F-
Physico-Chemical Properties
ValueUnitsTest Method / Conditions
Solid Content58 - 62%MA145LFE
Viscosity1000 - 4000mPa.sMA143LFE
pH3.5 - 5.5-MA148LFE
Average Particle Size300 - 600nmMA147LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size400nm-

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions
  • FILCO® 368 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 fromproduction, in the original package.
  • After that date product must be rechecked.
  • Prevent from freezing.