Allround fyllstoff som tilsettes for å kontrollere tykkelsen på limet. Gir en smidig og glatt epoxy-blanding. Benyttes til liming, laminering, fylling, nating, forsterking, rep. av hull/skader i glassfiberbåter, til epoxy-hulkiler, til nating av dekk, der man ønsker en tykkere epoxyblanding for å unngå sig osv. Tilsettes i forholdet 2-10 % av blandingens totale vekt.
Man kan også tilsette så mye at blandingen får en peanut-llignende konsistens som er ønskelig når man lager epoxyhulkiler etc.Dette fyllstoffet kan også brukes i kombinasjon med andre fyllstoffer.
COLLOIDAL SILICA (Adhesive Filler Additive 406)
What is it? Silica is the common name for silicon dioxide and WEST SYSTEM 406 Colloidal Silica filler is a white powder made of very small particles (each around 100 nanometres across) of finely-ground silica. Comprised of 47% silicon and 53% oxygen, silica is one of the most common compounds on earth, producing items such as quartz crystals, flints and some types of sand.
Used for? The ‘Colloidal’ bit always refers to a suspension of particles within a liquid in which they do not dissolve. For example, milk is a colloidal suspension of fat particles in water. Colloidal silica is designed mainly as thickeners that won’t break down after mixing into the host material. As such, they are widely used in construction concrete.
For epoxy and fibreglass work, colloidal silica is perhaps the cheapest and most general-purpose additive available as it has so many uses. The tiny particles are suspended within the mixed epoxy to thicken it for use as a filler, an adhesive or a filleting compound. It is electrically inert, so can be used as an insulator.
Each 406 Filler container includes a plastic scoop (you may have to dig for it if the contents have settled) that is calibrated to one full pump of resin and hardener to give the right consistency for a glue mix.
Chop, don’t stir.
“As a general thickener, 406 filler gives you accurate control over the consistency so you can tailor the mix to a specific task. For example, if you wish to fill screw holes, a mix delivered from a syringe gives more precision. The consistency can be tailored to flow through the syringe quite easily but still be thick enough not sag out of the screw holes”.
Great for glue
Stop the resin creep
“As a general purpose thickening additive, it can be used to prevent epoxy ‘migrating’ on vertical and overhead surfaces and to control the viscosity of the epoxy”.
Make a thin ‘gelcoat’
“When doing small composite moulding operations, adding 406 Filler at a weight ratio of 1% to the mixed WEST SYSTEM resin and hardener can create a gelcoat mix. This will provide a good base for paint and help prevent ‘print-through’ of the fabric”.
Mix the day before
“When making this epoxy/406 “gelcoat”, a great tip is to measure out all three components (i.e. resin, hardener and 406 filler) the day before and then mix the filler into the resin only – (without the hardener). This will provide time for the resin to thoroughly wet out all the 406 Colloidal Silica particles before the hardener is added when ready to do the job – but make sure you accurately measure out the three components!”