FILCO® 667 is an unsaturated polyester resin available in powder form, designed as a binder for glass mat applications. Its appearance is that of a light yellow powder. Key product characteristics include low viscosity in a molten state and a high binding capacity for glass fibers, particularly in 'hot melt' operating conditions. In its physical form as a powder, it serves multiple functions within composite materials, functioning as a resin, binder, and matrix material. It boasts features such as low viscosity and high binding power, classified under the polymer name 'Thermoset Polyester.

Functions: Resins, Binders & Matrix Materials

Chemical Family: Polyesters

Technical Data Sheet

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Enhanced TDS

Identification & Functionality

Chemical Family
Composite Materials Functions

Features & Benefits

  • Low viscosity at molten state
  • High binding power for glass fibers in “hot melt” operating conditions
  • Tg = 40°C

Applications & Uses

Compatible Reinforcements


Physical Form
Light yellow powder
Typical Properties
ValueUnitsTest Method / Conditions
Acid Number34mg KOH/gMA018LCP
Melt Index (at 105°C)20g/10 minutesMA109RPL
Particle Size Distribution
ValueUnitsTest Method / Conditions
Particle Size (500 μmm)99%MA123LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
24 months
Storage and Shelf Life Conditions

FILCO® 667 should be stored in closed containers away from direct sun rays, at temperature below +30°C. In these conditions maximum suggested storage time is 24 months from production, in the original package. After that date product must be rechecked.