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| Dow Corning 520 |
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Dow Corning?520 Dilutable Water Repellent Emulsion is a 40% active silane/siloxane emulsion.
It can be used at 40 percent actives or can be diluted in water to formulate a water repellent.
As with any other common water repellent, upon proper application, the formulated product will penetrate and provide water repellency by chemically reacting with the substrate.
Treated substrates are hydrophobic and retain their original appearance.
The active ingredients in Dow Corning 520 Dilutable Water Repellent Emulsion are small molecules to allow for deep penetration into the surface.
After the emulsion breaks, the active ingredients react with moisture to produce hydroxy groups.
These hydroxy groups bond with the substrate and each other to produce a hydrophobic treatment that inhibits water absorption into the substrate.
However, in the emulsion form, surfactants protect the reactive molecules from the water, providing emulsion stability. |
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Color: Milky white
Non-Volatile Content, percent: 40
pH: 4.5
Specific Gravity at 25'C (77'F): 0.985
Flash Point, closed cup, 'C ('F): >100 (212)
Density, lb/ gal: 8.216
Volatile Organic Compound(VOC) Content, g/L: <300
Solvent (Thinner): Water |
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