Silica is a mineral consisting of one part silicon and two parts oxygen, chemically silicon dioxide (SiO2). It is the most abundant mineral found at Earth's surface and its unique properties make it one of the most useful natural substances. Silica is found commonly in the crystalline state and rarely in an amorphous state. It is highly resistant to both mechanical and chemical weathering. Silica is ubiquitous, plentiful and durable.Features : Improves Exterior Durability Neutral pH Good Suspension Low Moisture Context Better Chemical Resistance.