Duratec Catalyst

[gstorr]

Getting ready to spray Duratec Vinylester Primer and it calls for "full strength mekP catalyst". The highest concentration mekP I can find is 50%, is this full strength? What catlyst should I be using?

Thanks

[Mark Poole ModVP]

50% is fine. When a gel coat or Duratec calls for that type of catalyst it means do not use 40% or 45%. Tooling gels are the same way they call for 50% (hot) catalyst.
Duratec gray sandable primer will call for 2% mix ratio but in hot weather that can be reduced to 1.5% with no problem.