Cadox L-30a VR

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Organic peroxide

Special MEKP formulation with VR system used for tooling and vinylester resin applications.

  • Product name

    Cadox L-30a VR
  • Chemical family

    Organic peroxide
  • CAS number

  • Physical form

  • Regional availability

    Latin America, North America
  • Chemical name

    Methyl ethyl ketone peroxide
  • Applications

    Cadox L-30a VR can be used in place of Cadox L-50a or Cadox L-50a VR wherever a more dilute solution of methyl ethyl ketone peroxide (MEKP) is desired. Cadox L-30a VR is a special purpose ‘summer catalyst’ for use in warmer shop environments. Cadox L-30a VR offers all the advantages of a red MEKP, except red parts. The VR series of products includes a red indicator system that virtually disappears during cure. The red is there when you need it, but not in the finished product. Visualize Hot & Cold Spots, Shrinkage Problems, Mass Effects, Thermal Effects of Core Materials and Dead Flow Zones in applications like Vacuum Infusion. Key features are: 

Market Segments

Thermoset composites

Detailed description

Special purpose catalyst (including vanishing red cure indicator) used for curing tooling gel coats and promoted unsaturated polyester resins in warmer climates. Low-hydrogen peroxide content reduces gel-coat porosity and provides improved curing of vinylester resins.


  • Curing agent