Alkali resistant glass Cem-FIL®

Cem-FIL® 61/2 is an Alkali Resistant glass fibre assembled roving designed for use in the manufacture of glass fibre reinforced concrete (GRC) composites by both premix and simultaneous spray methods.

In the premix process, Cem-FIL® 61/2 is chopped into small strands with high abrasion resistance. The fibre remains integral and this provides easy incorporation into the matrices and good workability. Cem-FIL® 61/2’s new sizing technology reduces the water absorption of the fibre strand, allowing a reduction in the water content of the matrix, or an increase in the fibre content. In the spray process, Cem-FIL® 61/2 has good split efficiency and easy chopping with low fuzz generation. Cem-FIL® 61/2's hydrophobic behaviour makes the mix more fluid and that assures better compaction and easier release of trapped air.


  • Alkali resistant glass*
  • Ideal for use with complicated profiles
  • Good unwinding
  • Excellent reproduction of detail
  • Easy chopping
  • Suitable for both premix and spray
  • High split efficiency
  • Excellent mechanical performance
  • Very easy incorporation into the matrix
  • Makes highly durable GRC elements
*Our fibres are manufactured with high Zirconia content in compliance with ASTM C1666/C 1666/M-07 and EN 15422 and under the recommendations of PCI and GRCA.