Pentox-40 / Pentox-40*

Peroxide initiator of high reactivity, used for curing of unsaturated polyester resins at ambient temperature in the presence of cobalt accelerator. For most of the resins it presents similar gel time as Metox-50W. However, it presents much more shorter cure time and higher temperature peak.

* Coloured version allows to control the flow of initiator during the dosage and the course of polymerization (it discolours during curing).


  • Spray lay-up and hand lay-up
  • RTM (resin transfer moulding)
  • Cold press moulding
  • Polymer concrete and artificial marble
  • Centrifugal laminating
  • Continuous laminating