Hardener MEKP for polyester based resins & gelcoats, adhesive resins. MEKP hardener is a universal standard MEKP for hand lay-up, fiber spraying, winding and centrifugal processes as well as for gelcoats, polymer concrete and many other processes. In addition to cobalt accelerators (Co), a much faster reaction with shorter demolding times can be achieved by using promoters such as dimethylaniline (DMA). Each UP resin requires a matched MEKP accelerator system. The required quantities depend on various factors, such as processing method, resin type, required processing and pot life, wall thickness, processing temperature, co-use of fillers and optimum metering quantity of MEKP and accelerator.