See through methyl silicone oil in one picture
methyl Silicone oil is widely used in electronic appliances, building materials, motor manufacturing, transportation, petrochemicals, textiles, printing and dyeing, thread making, finishing of various polyester, polyester-cotton, and polyester-rayon textiles to improve smoothness and elasticity, as well as in medicine and health, aviation Scientific research and military technology and other fields.
From: China Silicone Forum