CAB-O-SIL® untreated amorphous fumed silicas are high purity silicas manufactured by high temperature hydrolysis of chlorosilanes in a hydrogen/oxygen flame. They have extremely small particle sizes and varying surface areas. The silicas' benefits include rheology control, reinforcement and free flow. CAB-O-SIL is used in numerous applications such as silicone rubber, adhesives, sealants, coatings, cosmetics, pharmaceuticals, composites, elastomers, foods, and inks.
Use in moderation so that you do not overfill! Primarily this is used to thicken a polyester resin used in lamination processes to preven drainage from the chopped strand mat or glass fibre reinforcement on verticals and overheads. DO NOT USE IN SILICONE AS A THIXOTROPE!
It is white in colour but any pigment addition should overide this colour change. Though this might appear an expensive filler half a kilo is a very big bag and will thicken a lot of resin.
We have been supplying Polyester Casting Resin and Mould Making Supplies for many years and can offer full datasheets to go along with our product as well as safety and handling data, a legal requirement. These are emailed as links for download at the end of the auction. This item is not considered hazardous but may cause eye or lung irritation.
Item is packaged in a sealed plastic bag and is dry on despatch. Ensure the filler is fully dry before mixing, failure to do so will make it difficult to mix and possible weaken you cast. It has a very high melting point and could be dried in an oven if needed. Ensure that the fan does not atomise the powder.
For technical queries see the technical datasheet on CABOSIL which should answer most questions.
For other size kits or different fillers go to our Polyester Resin Fillers section of our eBay shop.


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Items ordered individually attract the standard postage rate as shown in the postage section. All items travel via Packetpost Second Class. You may send up to a maximum of 2kg via this method. Items totalling more than 2kg packed weight (not item weight) will be upgraded to courier delivery or split between cartons. If your postage total is greater than £7-50, consider asking for an invoice during checkout for a better rate! If courier rates do apply, or you are choosing to upgrade to courier delivery, please see below for surcharging of certain postal codes. Single items purchased will ALL travel via Royal Mail and attract no surcharge, including Northern Ireland. Southern Eire is classed as an international destination by Royal Mail.
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COURIER DELIVERY SURCHARGES IF APPLICABLE:
Republic of Eire (Southern Ireland) : £5 Surcharge
AB31-35, AB40-56, IV1-28, IV30-32, IV36-40, IV52-54, KW1-14, PA21-28, PH4-PH41, PH49-50 & All BT Northern Eire Postcodes: £7 Surcharge
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If you fall within a zone above and your order exceeds 20kg of weight, please contact us prior to purchase for a delivery cost!
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