For TPE polymer materials, specific gravity does not seem to be a core physical property index. However, if the specific gravity is high or low, the material cost can be appropriately reduced. In addition, for some products that require submerged or floating water (such as floating cables), it is critical to control the specific gravity. TPE is the general name of various thermoplastic elastomers, and TPE can be modified and customized. The proportion of TPE materials in different varieties and compounding systems is different. This paper sorts out the proportion of TPE, which is the main thermoplastic elastomer, hoping to help readers. Material specific gravity SEBS (polymer) 0.9-0.91 SBS (dry glue) 0.94 SBS (oil glue) 0.91-0.92 TPE(S) SBS+PS+ calcium carbonate+oil+others 0.93-1.3 TPE(S) SEBS+PP+ calcium carbonate+oil+others 0.83~2.0 0.91-1.20 parts of TPV/TPO(PP+EPDM/ polyolefin elastomer/crosslinking agent+calcium carbonate) 1.06-1.25 parts of TPU(TPU+ calcium carbonate+others) TPEE 1.04~1.08 0.5-0.9 part of ETPES/ETPU (foamed TPE, TPU) 0.95 to 1.3 parts of TPE elastomer of other special compounding systems Generally speaking, the specific gravity of TPE ranges from 0.5 to 2.0. Foamed TPE is an extremely low specific gravity material, which is generally used for foamed soles (such as popcorn soles which are popular recently), thermal insulation materials, foamed sealing strips, bottle stoppers and so on. Extremely high specific gravity TPE(TPR), such as eraser materials.