Ethylene glycol (EG) is known as a conductivity-enhancer of films made of poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS), a degrading agent of polyethylene terephtalate (PET) and a plasticizer of latex. The influence of ethylene glycol (EG) on PET-textiles coated with polyurethane (PU) and PEDOT:PSS dispersions was therefore studied with respect to surface resistivity as a means to appreciate conductivity, and tear and tensile strength to appreciate the mechanical properties. Samples of the PET substrate were also immersed in a 20 w/w-% EG solution and Fourier transform infrared spectroscopy (FTIR) was used to detect any PET degradation. The resistivity dropped with three orders of magnitude with 10 % EG of PEDOT:PSS dispersion, i.e. 6 wt-% of the entire coating formulation. The addition of EG did not affect the tear and tensile strength of the coated samples, nor did subjection to EG-solution have a degrading effect on the PET substrate, indicating that EG does not deteriorate the coated textile.