For the DEA measurement, A mineral wool infiltrated with the uncured resin was analyzed using the DEA 288. Presented is the logarithm of the ion viscosity and loss factor of the polyester resin on the wool versus temperature. During heating, the ion viscosity decreases above approx. 70°C and the loss factor increases in the same temperature range. This is due to the softening of the dried resin. Above 153°C, the ion viscosity increases up to approx. 237°C. This indicates a decrease in the ion mobility and therefore represents the curing process of the resin. The curing process is finished at this temperature.