Fumed Silica Filler – 1kg Important Fumed Silica requires significant agitation (stirring) to become fully mixed into a resin. Use of a mechanical stirrer will make the process quicker and easier but manual mixing is perfectly possible. Fumed Silica added to resin at a ratio of 0.7% – 1% (by weight) will produce a thixotropic resin. 2-3% will produce a gelcoat consistency. Percentages up to 3% can be used to make a filler paste although additional filler powders are typically also required. Please note the addition of Fumed Silica will reduce the clarity of clear resin systems meaning it is not ideal for turning clear laminating resin into a clear gelcoat. Fumed Silica particles are very small and will become airborne as soon as the material is scooped, moved or mixed. Always wear protective gloves and a dust mask when handling this product in its raw state. Application Fumed Silica Filler – 0.25kg is applied as a thickening and thixotropic agent in many organic systems, e.g. in unsaturated polyesters, coatings, printing inks, adhesives, cosmetics and others. It is used as a reinforcing filler in elastomers, mainly silicone-elastomers. It acts as a free flow additive in the production of technical powders, in food and feed and in pharmaceutical products. Characteristics Synthetic, hydrophilic amorphous silica, produced via flame hydrolysis. Special characteristics White colloidal powder of high purity. Processing A good dispersion is a must to assure optimum performance. Storage Has a shelf life of at least 24 months when stored in unbroken original packaging in dry storage areas. The ‘Best use before end’ date of each batch appears on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.