FILCO® 348HP is an epoxy resin formulated within a non-ionic water emulsion, designed specifically as a film-former within glass fiber sizings. Its appearance resembles that of a milky liquid. Key product characteristics encompass its composition as a pure epoxy resin, a narrow particle size distribution, stability against hydrolysis and sedimentation, high mechanical shear stability even in diluted emulsions, and, notably, a very high solid content.

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

Composite Materials Functions

Features & Benefits

  • Pure epoxy resin
  • Epoxy equivalent around 275 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
  • Very high solid content
Characteristics of Film
  • Clear
  • Tacky
  • Compatible with unsaturated polyester, epoxy, phenolic matrices
  • Quickly soluble in styrene

Applications & Uses

Compatible Reinforcements
Composites Processing Methods
Processing Information

FILCO® 348HP 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
Solid Content63%MA145LFE
Epoxy Equivalent Weight (on dry resin)275nmMA149LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size300nmMA147LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions

FILCO® 348HP 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