Tannin made from gambier extract contains hydroxyl groups and so can be modified to synthesize polymers. Gambier extract has a high tannin content that contains polyflavonoids with other additives. This allows it to be modified by polycondensation to make a polymer foam which can be used as an insulator for heat and sound, an absorber of heavy metal pollutants and for protective packaging. This study investigates the utilization of gambier in the manufacture of foam and determines the physical properties of the foam produced. The study was conducted using ethanol to produce the gambier extract from leaves of the plant which was used in the proportions of 14%, 24%, and 34% by weight to make different foam samples. Foam produced from 24% gambier extract had optimum qualities with a density value of 0.34 g/cm 3 , pH 6.83, compressive strength of 0.14 kg/cm 2 , thermal conductivity of 5.52 W/m o C, and was semi-flexible foam.