FILCO® 659 MG 25 is an unsaturated polyester resin available in powder form and enriched with a catalyst. Classified under the polymer name 'Thermoset Polyester,' it functions as a resin, binder, and matrix material within composite applications. Its physical form is in a powdered state, serving various roles within composite materials.

Polymer Name: Thermoset Polyester

Chemical Family: Polyesters

Technical Data Sheet

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Enhanced TDS

Identification & Functionality

Additives Included
Chemical Family
Composite Materials Functions


Physical Form
White powder
Typical Properties
ValueUnitsTest Method / Conditions
Acid Number40mg KOH/gMA018LCP
Particle Size Distribution
ValueUnitsTest Method / Conditions
Particle Size (>425 μm)3%MA123LFE
Particle Size (>250 μm)40%MA123LFE
Particle Size (>150 μm)32%MA123LFE
Particle Size (>75 μm)22%MA123LFE
Particle Size (>45 μm)1%MA123LFE
Particle Size (Passing Through)2%MA123LFE
Average Particle Size (Laser D10)33μmMA243LFE
Average Particle Size (Laser D50)200μmMA243LFE
Average Particle Size (Laser D90)400μmMA243LFE
Average Particle Size (Laser Mode)270μmMA243LFE
Average Particle Size (Laser D4/3)210μmMA243LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions
  • The shelf life of FILCO® 659 MG 25 is 6 months from production date, when stored in sealed original container.
  • FILCO® 659 MG 25 should be stored at temperatures below 25°C, far from direct sun rays