Sodium silicate has outstanding binding properties and prospective applications in a wide range of fields because it is non-toxic, fireproof, odorless, and free of volatile organic compounds. However, its poor water resistance has limited its use as an adhesive in the wood industry on a large scale. In order to improve the bonding properties of sodium silicate and teak wood three sets of sodium silicate adhesives (simple sodium silicate, modified sodium silicate with silica gel G, and gum arabic with modified sodium silicate) were made. The results showed that modified sodium silicate with 4% gum arabic works best for tensile strength and 6% gum arabic works best for water resistance with reference to 24 hour water absorption rate. Results of FT-IR data showed that gum arabic was successfully mixed into the silicate structure, having good thermal stability in the range of 27° C – 800°C, as supported by TGA results.