Cab O Sil®

Buy Cab O Sil®

Weight Cost Quantity
M5 - 500g £15.20
TS-720 - 500g £20.60
M5 - 1kg £29.10
TS-720 - 1kg £39.90
M5 - 6kg £121.80
M5 - 10kg £165.00
TS-720 - 6kg £186.50
TS-720 - 10kg £271.00

Cab-O-Sil is the name for a range of amorphous fumed silica products made by Cabot Corporation. The molecular structure consists of nanometre droplets of amorphous silica fused into branched chains. They are characterised by high purity, low bulk density and submicron particle size. 

Cabot Cab-O-Sil® M-5 is a medium surface area fumed silica which imparts a significant increase in viscosity to liquid systems, free flow of powders and reinforcement of silicone and organic rubbers.

Cabot Cab-O-Sil® TS-720 is a medium surface area fumed silica which has been surface modified with polydimethylsiloxane. The treatment renders it extremely hydrophobic, with very different properties to untreated silica grades like M5.

Wacker Silicones N20ST is an untreated fumed silica very similar to Cabot Cab-O-Sil M5. Limited stock, economical 10kg bags only.

Cab-O-Sil M5

 Cab-O-Sil TS-720

There are some restrictions on food, medical and cosmetic applications for the M5 grade of Cab-O-Sil®, please refer to the downloads section at the bottom of this page for more details.


Colour: White
Odour: Odourless
Melting point: 1700 ºC
Boiling point: 2230 ºC
Particle size: Submicron. Max 0.02% residue on 325 mesh (M5).
BET surface area: Typical 200m²/g, Allowable 175-225m²/g (M5)
Bulk density: Typical 50g/l, Maximum 60g/l (M5)
Loss on heating: 1.0% max (M5)
pH: 3.8 - 4.3 (M5)
Refractive index: ~1.46
Brand: Cabot UK (Bags less than 10kg repackaged at Inoxia).


Read label before use. Keep out of reach of children. If medical advice is needed, have product container or label at hand. Irritating to eyes. May cause sensitisation by skin contact.
Do not breathe dust. Avoid contact with skin. Avoid contact with eyes, In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. After contact with skin, wash immediately with plenty of soapy water. In case of insufficient ventilation wear suitable respiratory equipment.
Dry powders can build static electrical charges when subject to friction by mixing, sliding, pouring or conveying. Proper safety precautions including adequate electrical grounding, inerting the air space above flammable or explosive liquids etc, should be taken to prevent accidents. Refer to NFPA no -77-1984 for further details.


Cab-O-Sil MSDS

Cab-O-Sil M5 - Food, cosmetic and medical use regulations

Cab-O-Sil TS-720 - Technical

Cab-O-Sil Guide

Product Identifiers

M5 - 10kg: 0029882790410, M5 - 500g: 0029882792025, M5 - 1kg: 0029882792032, M5 - 6kg: 0029882792049, TS-720 - 500g: 0029882794098, TS-720 - 1kg: 0029882794104, TS-720 - 6kg: 0029882794111, TS-720 - 10kg: 0029882794128,
Forgotton password?
Don't have an account? Register now.