LIGHTLINE® is a non-metallic composite designed primarily for use as a central strength member or peripheral strength element in fiber optic cables. This GRP is produced with E-glass fibers and vinylester or epoxy resin. Its high-glass transition temperature (up to 150° C) makes LIGHTLINE® ideal for high temperature environments.

General Purpose Glass Reinforced Plastic (GRP)

  • Inter- and intrabuilding installations
  • High temperature environments
  • OPGW
  • ADSS and other aerial installations
  • Premise Distribution
  • Underground - direct burial and conduit
Features & Benefits
  • All dielectric
  • High elastic modulus
  • High flexibility
  • Coefficient of Thermal Expansion(CTE) similar to optical fiber
  • Custom profiles and lengths available
  • Geometrical accuracy and smooth surface for ease of extrusion, fitting and quality
  • Wide range of sizes available

Minimum Technical Specifications
  • Tensile Strength
  • Elastic Modulus
  • Flexural Modulus
  • Elongation at break
  • Coefficient of Thermal Expansion (CTE)
  • Tg (Glass Transition)

> 1.25 GPa
> 50 GPa
>48 GPa
> 2.5%
5.9 x 10-6
110° - 130° C or 150° C (MTO)
  • Minimum Bend Radius
  • Diameter Tolerance
  • Minimum Order Quantity
  • Maximum Length
40 x diameter
+/- 5%

NEPTCO's LIGHTLINE® Products are available in a number of different constructions. Click on the links below to view pdf copies of select data sheets.

Product Name
LIGHTLINE (LFH)GRP with tightest diameter tolerances


Standard LIGHTLINE with specialized adhesive coatings
Flat LIGHTLINE (LFH/F) Rectangular composite used for crossply sheathing and ballistic protection