The capillary column inverse gas chromatography (CCIGC) method at infinite and finite dilution of solvent was used to measure the diffusion and partition coefficients of toluene in an acrylic adhesive polymer and a rubber-based adhesive polymer. Experiments were performed over a temperature range of 60 to 100°C. Chromatographic data analysis was carried out in terms of the elution model described by Pawlisch and coworkers (1987, 1988). The Vrentas-Duda free-volume model was used to correlate the data for use in predictions of diffusion coefficients at temperatures found in current industrial applications.