Silica, Size: 1 Kg

SKU: NAP-510-15SLC1K
    Unit Price
    US 8.63$
    US 11.50$
    US 8.63$
    US 11.50$
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    Processing time
    Usually ships the next business day.

    This is a high-purity, natural crystalline silica that comes from quartz quarries in Oklahoma. It is a fine ground silica sand that is inherently inert, white, bright, and at least 99.2% silicon dioxide. Special processing assures a controlled particle size distribution, eliminating excessively coarse and fine particles. These properties, combined with its inertness and low cost, make silica an excellent filler and extender for paint.

    The hardness and inertness of silica improve resistance to wear, burnish, abrasion and stains. The narrow size distribution and bright white color minimize binder demand and yield an excellent color. It is also often used to replace as much as 50% of titanium dioxide in paint formulations.

    Silica (SiO2) is a compound formed from silicon and oxygen. Because oxygen is an abundant element and silicon is the second most abundant element in the Earth's crust, the formation of silica is quite common in nature. Silica sand, the substance used to derive pure silicon, is made of quartz, which is the most common form of silica found in nature. Crystalline silica exists in seven different forms. The three major forms, quartz, cristobalite, and tridymite, are stable at different temperatures. Within the three major forms are subdivisions. Crystalline silica is ubiquitous, being in rocks from every geologic era and from every location around the world.

    Recommended Uses

    Add silica to paint and mediums to create textural and bodying qualities in oil paint without affecting the color. Silica has a little color in drying oil, so it can be added to oil paint without affecting the tint of the color. Due to its hardness, it tends to add a discernible texture to paint. Add to chalk or gesso to add texture or 'tooth' in chalk or gesso grounds.

    Description Fine dry-ground silica with a closely-controlled particle size distribution.
    Source Mill Creek, Oklahoma
    Chemical Analysis
    Silicon Dioxide (SiO2) 99.4%
    Typical Physical Properties
    Median Particle Size 1.6 microns
    Particles Finer than 5 Microns 96.3%
    Hegman 8
    Retained on 325 Mesh Screen 0.003%
    Hardness (Mohs) 7
    Yellowness Index (ASTM E313)* 1.6
    Reflectance 94.5%
    pH 6.7
    Oil Absorption 42 g oil / 100 g pigment
    Specific Gravity 2.65
    Bulk Density, Compacted 41.0 lbs./ft3 (656 kg/m3)
    Bulk Density, Loose 36 lbs./ft3 (576 kg/m3)

    * The Yellowness Index is a number calculated from spectrophotometric data that describes the change in color of a test sample from clear or white to yellow. This test is most commonly used to evaluate color changes in a material caused by outdoor exposure.

    Health and Safety

    WARNING: This product contains crystalline silica, which can cause silicosis (an occupational lung disease) and lung cancer. For detailed information on the potential health effects of crystalline silica, see the Material Safety Data Sheet.

    Shipping specs
    2.2 lbs
    Shipping weight
    6.2 lbs
    Shipping from
    This product is shipped from our supplier's warehouse in Willits, CA, United States
    Our guarantee
    This product is brand new and includes the manufacturer's warranty, so you can buy with confidence.
    A 25% handling charge is levied against all authorized returns except those due to our error. Unauthorized returns are subject to a 40% handling charge. Damages & defects must be reported to us within 14 days.
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