This listing is for our Fumed Silica Thixotropic Powder for use in resin and gelcoats to make them more thixotropic. Also known as colloidal silica, fumed silica can be used to transform epoxy or polyester resin into a thick gelcoat or, with the addition of glass bubbles into a lightweight filler.

Available in the following packsizes: 45g (approx 1litre), 225g (approx 5 litres) and 450g (approx 10 litres).

Aerosil® 200 Fumed Silica is an ultra-fine powder used to increase the viscosity (thickness) of resin systems. Adding a small amount of fumed silica to epoxy resin will significantly increase the thixotropic properties of the resin, effectively turning it into a gelcoat and allowing it to cling to sides of steep moulds without running.

Typical Uses

Our Fumed Silica Thixotropic Powder is compatible with all popular resin systems, including polyurethane, epoxy and polyester.

How to Buy

Our Fumed Silica Thixotropic Powder is sold by volume and is available in 1litre (45g), 5litre (225g) and 10litre (550g) pack sizes. Please choose the pack size you require from the drop-down menu at the top of the page.

Please contact us if you would like to discuss larger quantities.

Further Information

How to Use Fumed (Colloidal) Silica

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. For maximum effect, allow the Fumed Silica to soak in the resin for as much as a day before thorough mixing.

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 (additional filler powders may be 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.

Safety

Fumed Silica particles are incredibly small and light 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.

All materials are supplied in high quality, re-sealable containers and shipped in protective packaging.

Instructions:

Please refer to the technical and safety datasheets before use - these can be found on our Easy Composites website.

Any Questions?

The team behind Easy Composites products are on hand to help with any questions you may have, whether you want help with calculations, need advice on the process, or troubleshooting.

If you need any help or advice just call us, we're here 5 days a week; 8am to 5:30pm (Mon-Fri) and what we don't know about resin and gelcoats isn't worth knowing!

Delivery

Fumed silica thixotropic powder is held in stock in the Easy Composites warehouse in Stoke-on-Trent. All orders are dispatched same-day (orders received before 12:00) for next-working day delivery. Because epoxy resin is classified as 'dangerous goods' it can only be sent by specialist carrier.

Trade counter collections are welcome; please contact us to arrange.