Natural rubber is elastomeric and thermosetting in nature, making it difficult to shape and cannot be recycled. Modification of waste tire rubber into powder for key chain rubber mixtures is intended to obtain a material that is easy to mold into finished products and can be recycled so that it does not damage the environment. In order to obtain a powder form from waste ure rubber, experiments have been carried out with the grating method (ingestion) directly on waste tres. The process of mixing natural rubber and hegy tire waste powder is carried out at a temperature of 180-200°C for 7 minutes. Comparison of the composition of natural rubber latex and waste tire powder mixed in several variations: 80:20, 85:15. 90:10: 95.5 % by weight) with a 11 composition of natural rubber and tire waste powder.