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Levasil FO1440
Colloidal silica for bonding and rigidizing fibers
Levasil FO1440 is the most commonly used colloidal silica for bonding refractory fibers and rigidizing refractory fiber shapes and boards. Levasil FO1440 is an economical 40% concentration silica sol of 14 nanometer diameter amorphous silica spheres. The particles carry a slightly negative surface charge with a high surface area to weight ratio for good floccing with Westar+ and Westar+3 cationic starch.

Levasil FO1440 offers these advantages

Good High Temperature Bonds - Colloidal silica bonds withstand temperatures up to 2300oF with low shrinkage..
Saves Money - Economical 40% concentration reduces freight and package costs over lower concentration sols.
Flocs with Cationic Starch - Negative surface charge flocs cationic starch refractory fibers together to form a three dimensional floc for good product strength.
Rigidizes Effectively - Can be used diluted or full strength for sealing or rigidizing of fiber-bonded shapes.
Typical Physical Properties

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Color Clear
Consistency Slightly viscous liquid
Specific Gravity 1.3
Particle Size, nm 14 average
Silica, wt% 40
Na2O, wt% 0.50
pH @ 25oC 10.4
Viscosity @ 25oC, cp 15
Toxicity Non-toxic. See MSDS.
Packaging Bulk tanks, 4000 gal; totes, 275 gal. ;drums, 55 gal; pails, 5 gal.

WesBond Corporation

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Wilmington, DE  19801

phone (302) 655-7917 fax (302) 656-7885 

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Last modified Friday, September 16, 2016