FILCO® JM 366 is an unsaturated polyester resin formulated in a non-ionic water emulsion. It's characterized by its highly unsaturated nature, which integrates a non-ionic emulsifier within the polymer matrix. This resin offers stability against hydrolysis and sedimentation, features a narrow distribution of particle sizes, and maintains high mechanical shear stability even in diluted emulsion forms.

Functions: Film Former

Chemical Family: Polyesters, Unsaturated Polyester (UPE)

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Labeling Claims
Product Highlights

FILCO® JM 366 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

FILCO® JM 366 is suggested as film former for glass fiber sizes for:

  • SMC roving
  • BMC chopped strand

Application procedures:
FILCO® JM 366 can be used alone, or can be crosslinked with peroxide, preferably in emulsion form, 0.5 - 1% by weight. 


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Viscosity (at 25°C, #3, 20rpm)max. 5000mPa.sMA143LFE
Solid Content37 - 41%MA145LFE
pH (at 20°C)1 - 4-MA148LFE

Packaging & Availability

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

FILCO® JM 366 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® JM 366 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.