FILCO® JS 105 is an unsaturated polyester resin provided in a milky liquid, non-ionic water emulsion. This resin is known for its highly unsaturated nature and contains a non-ionic emulsifier integrated into the polymer structure. Its key characteristics include hydrolysis and sedimentation stability, ensuring prolonged stability over time, a narrow distribution of particle sizes for uniform application, and high mechanical shear stability, particularly when the emulsion is diluted. These features make it suitable for various applications within the realm of polymer and emulsion-based processes, especially in the context of glass fiber treatment.

Functions: Film Former

Chemical Family: Polyesters, Unsaturated Polyester (UPE)

Technical Data Sheet

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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Materials Features
Product Highlights

FILCO® JS 105 is an unsaturated polyester resin in non ionic water emulsion.

  • Highly unsaturated polyester resin
  • Non ionic emulsifier built in the polymer
  • Hydrolysis and sedimentation stability from pH 1 to 6: min. 48 h.
  • Narrow particle sizes distribution
  • High mechanical shear stability of the diluted emulsion.
Characteristics of Film
  • Clear
  • Non tacky
  • Highly crosslinked
  • Low solubility in styrene.

Applications & Uses

Compatible Reinforcements
Composites End Use

FILCO® JS 105 is suggested as film former for glass fiber sizes for:

  • SMC roving
  • BMC chopped strand


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C, #3, 20rpm)100 - 5000mPa.sMA143LFE
Solid Content42 - 46%MA145LFE
pH (at 20°C)1 - 4-MA148LFE

Packaging & Availability

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

FILCO® JS 105 is supplied in steel drums with a polyethylene liner, net weight 200 kg.

Storage & Handling

Shelf Life
6 months
Storage and Shelf Life Conditions

FILCO® JS 105 should be stored in closed drums away from direct sun rays, at a temperature between + 5°C and + 30°C. Maximum suggested storage time is 6 months from production, in the original package. After that date product must be rechecked.