... UnionFeature1.100% silicon rubber of promotion gift watch;2.Soft, smooth, flexible, stain-free and waterproof;4.fashion design, for business ... 1) non-toxic, odorless, chemically stable, insoluble in any solvents and solutions, in addition to hydrofluoric acid (HF) and strong base ... ) non-deliquescent, non-corrosive and non-soluble in water features, even full of water absorption, the look and feel, or ...