FILCO® 7900 is an unsaturated polyester-epoxy polymer dispersed in a milky liquid non-ionic water emulsion. It serves as a film for various types of glass fiber sizes, including roving for translucent sheets, spray roving, and mat roving. Laminates manufactured using glass fibers treated with FILCO® 7900 exhibit remarkably high transparency. Additionally, this product is non-flammable, ensuring safety in handling and usage.

Functions: Film Former

Chemical Family: Epoxy-Polyester Hybrid

Compatible Polymers & Resins: Epoxies (EP), Unsaturated Polyester (UPE)

Processing Methods: Spray Lay-up

Technical Data Sheet

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Identification & Functionality

Chemical Family
Composite Materials Functions

Features & Benefits

Labeling Claims

Applications & Uses

Compatible Polymers & Resins
Compatible Reinforcements
Composites End Use
Composites Processing Methods

FILCO® 7900 is suggested as film former for glass fiber sizes for:

  • Roving for translucent sheet
  • Spray roving
  • Mat roving

Laminates produced with glass fiber sized with FILCO® 7900 show very high transparency


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content45 - 47%MA145LFE
pH (at 20°C)2 - 4-MA148LFE
Epoxy Equivalent Weight (on emulsion)1900 - 2100gMA149LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size300 - 1000nmMA147LFE

Packaging & Availability

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

FILCO® 7900 is supplied in steel drums with an internal polyethylene liner, net weight 200 kg.

Storage & Handling

Shelf Life
6 months
Storage Conditions

FILCO® 7900 should be stored at temperatures between 5° C and 30°C. Maximum suggested storage time is 6 months from production, in the original package. After that date the product must be rechecked. During storge a slight settlement can take place, which can easily be eliminated by careful stirring.