... , Western Union Feature 1.100% silicon rubber of the pot holder;2.Soft, smooth, flexible, stain-free and waterproof;3.It ... advantages:(1) non-toxic, odorless, chemically stable, insoluble in any solvents and solutions, in addition to hydrofluoric acid (HF) and strong base ... °C long-term use under high temperature conditions.(3) silica gel has a rigid frame structure, high mechanical strength, good wear ...