An adhesive composition comprising: 0.1 wt% to 99 wt%, based on the total weight of the adhesive composition, of a random propylene polymer component having a heat of fusion (measured according to ASTM E 794-85 as described herein) of between 1 and 70 J/g and an mm triad tacticity index (measured using 13 C NMR and calculated according to the method of H.N. Cheng, Macromolecules, 17, 1950) of at least 75%; 0.1 wt% to 99 wt%, based on the total weight of the adhesive composition, of a functionalized polymer component comprising a C 2 -C 20 olefin comprising at least 0.1 wt% of a functional group; and from 10 to 99 wt% of a non-functionalized plasticizer wherein the non-functionalized plasticizer has a flash point of 200°C or more, a pour point of -20°C or less, a viscosity index of 120 or more, a kinematic viscosity at 100°C of 3 cSt or greater, an APHA colour of 100 or less and a specific gravity (15.6°C) of less than 0.86, wherein the adhesive composition has a T-Peel adhesion (measured according to a modified ASTM D-1876 described herein) on a polar substrate at 20°C of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20°C of at least 175 N/m (1 lb/in) and the polarity of the polar substrate is at least 0.10 units higher than the polarity of the non-polar substrate (substrate polarity determined using the harmonic-mean method as described herein), wherein functionalized syndiotactic rich polyolefin comprising at least 50% r-dyads (as determined according to the Ewen method J. A. Ewen, "Catalytic Polymerization of Olefins," Eds. T. Keii, K. Soga; Kodanska Elsevier, Pub Tokyo, 1986, p271), if present, is present at 5 wt % or less. 0.1 wt% to 99 wt%, based on the total weight of the adhesive composition, of a random propylene polymer component having a heat of fusion (measured according to ASTM E 794-85 as described herein) of between 1 and 70 J/g and an mm triad tacticity index (measured using 13 C NMR and calculated according to the method of H.N. Cheng, Macromolecules, 17, 1950) of at least 75%; 0.1 wt% to 99 wt%, based on the total weight of the adhesive composition, of a functionalized polymer component comprising a C 2 -C 20 olefin comprising at least 0.1 wt% of a functional group; and from 10 to 99 wt% of a non-functionalized plasticizer wherein the non-functionalized plasticizer has a flash point of 200°C or more, a pour point of -20°C or less, a viscosity index of 120 or more, a kinematic viscosity at 100°C of 3 cSt or greater, an APHA colour of 100 or less and a specific gravity (15.6°C) of less than 0.86, wherein the adhesive composition has a T-Peel adhesion (measured according to a modified ASTM D-1876 described herein) on a polar substrate at 20°C of at least 175 N/m (1 lb/in) and a T-Peel adhesion on a non-polar substrate at 20°C of at least 175 N/m (1 lb/in) and the polarity of the polar substrate is at least 0.10 units higher than the polarity of the non-polar substrate (substrate polarity determined using the harmonic-mean method as described herein), wherein functionalized syndiotactic rich polyolefin comprising at least 50% r-dyads (as determined according to the Ewen method J. A. Ewen, "Catalytic Polymerization of Olefins," Eds. T. Keii, K. Soga; Kodanska Elsevier, Pub Tokyo, 1986, p271), if present, is present at 5 wt % or less.