Methyl silica gel which can be used as waterproofing material . Methyl silica gel Formula: (CH3Si1.5)n Appearence: solid , wet, polydisperse, product, white color Mass share of hydrogen chloride: ≤1.0%Mass share of non-volatiles: 45%-55%Mass share of silicone ≥18.8%Application: used as water repellent agent WATER REPELLENT AGENT METHYL SILICA GEL