FILCO® 657/01 NP represents an unsaturated polyester resin available in powder form, presenting as an off-white, free-flowing powder. It serves as a recommended binder for producing insoluble glass mats. These mats, derived from chopped strands or continuous filaments, find application in various processes such as hot or cold press, pultrusion, vacuum, and injection (RTM) moldings.

Functions: Resins, Binders & Matrix Materials

Chemical Family: Polyesters

Processing Methods: Pultrusion, Resin Transfer Molding (RTM)

Technical Data Sheet

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Identification & Functionality

Chemical Family
Composite Materials Functions

Applications & Uses

Compatible Reinforcements
Composites Processing Methods

FILCO® 657/01 NP is recommended as a binder for the production of insoluble glass mats. These mats, obtained with chopped strand or continuous filaments, are used for example in hot or cold press, pultrusion, vacuum and injection (RTM) moldings.


Physical Form
Off white free flowing powder
Typical Properties
ValueUnitsTest Method / Conditions
Acid Number35 - 45mg KOH/gMA018LCP
Particle Size Distribution
ValueUnitsTest Method / Conditions
Particle Size (On 500 μm)0%MA123LFE
Particle Size (On 425 μm)max. 4%MA123LFE
Particle Size (On 250 μm)36 - 46%MA123LFE
Particle Size (On 150 μm)26 - 38%MA123LFE
Particle Size (On 75 μm)15 - 25%MA123LFE
Particle Size (On 45 μm)max. 6%MA123LFE
Particle Size (Passing Through)max. 3%MA123LFE

Packaging & Availability

Packaging Type
Regional Availability
  • Canada
  • Mexico
  • USA
Packaging Information

FILCO® 657/01 NP is supplied in 125 kg fiber drums

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions

FILCO® 657/01 NP should be stored in closed drums in fresh, dry environment at temperatures below 25° C, away from direct sun rays and source of heat. In these condition the suggested storage time is 6 months.