15% Potassium Hex-Cem is a potassium 2-ethylhexanoate dissolved in diethylen diglycol which combined with cobalt support the accelerating effect in unsaturated polyesters. This results in a decrease of discoloration of UPS-Systems caused by Cobalt. Further it is also capable of stabilizing the rheological and the pot life behaviour of waterborne 2-components PUR systems and additionally it can positively affect the haze-values of these paint systems.