SIDISTAR® T 100 is a densified, amorphous, spherical silicon dioxide compatible with all thermoplastic systems. It acts as a flame retardancy synergist for thermoplastics and as a nucleating agent and an anti plate out agent for PVC foam.


SIDISTAR® T100 is a specially designed grey-coloured process modifier consisting of spherical, sub-micron, particles of silicon dioxide. The nature of the product allows excellent dispersion of these particles in the polymer matrix. This leads to improved distribution of all compound ingredients and a better flow, allowing higher extrusion speeds and smoother surface of the end product. The product is supplied in a densified, free flowing, form. 


SIDISTAR® T100 has been designed for usage in thermoplastics.  Areas of use include flame retardant cable compounds, and improved fibre dispersion in thermoplastics.

The densified version is specifically designed for easier handling in higher viscosity polymer systems where a medium amount of shear energy is needed for full dispersion. 

Storage conditions

The product is recommended to be stored in a covered dry place, protected from direct UV light. Recommended storage temperature between +5 ºC and +40 ºC (+45ºF and +104ºF) . It’s important that the minimum temperature is > 5ºC (9ºF) above the dew point. Recommended relative humidity < 85%. 

Shelf life

We recommend that the product should be used within 2 years from production date.

Physical data and chemical properties

PropertiesTest methodUnitLimits
SiO2 (Silicon dioxide, amorphous) ESM-LAB-18 % 96.0 - 99.0
C (Carbon) ESM-LAB-05 % ≤ 1.5
Fe2O3 (Iron oxide) ESM-LAB-17 % ≤ 0.25
H2O (Moisture, when packed) ESM-LAB-02 % ≤ 0.8
Loss on Ignition (L.O.I.) @ 950o C ESM-LAB-03 % ≤ 1.80
pH-value (fresh) ESM-LAB-10   6.5 - 8.5
Bulk Density (when packed) ESM-LAB-08 kg/m3 400 - 700


Other properties (Measured on undensified material)UnitTypical values*
Specific surface area (BET) m2/g 18 - 25
Median particle size μm 0.15
Specific Gravity   2.2

*Typical values are for indicational use only, values are not part of Elkem Silicon Materials standard analysis.

Test methods

Material data given in this product specification refer to analysis according to Elkem internal standard test methods, which are available upon request.


DescriptionBig bagsSmall bags
Bag on pallet 1 big bag 50 small bags
Net weight 1 bag 850 kg 20 kg
Net weight on pallet 850 kg (1,874 lb) 1000 (2205 lb)
Gross weight

850 + 20 = 870 kg
(1874 + 44 = 1918 lb)

1000 + 20 = 1020 kg
(2205 + 44 = 2249 lb)

Bag dimension (L x W x H)

106 x 106 x 142 cm
(41.7 x 41.7 x 55.9 in) 

 73 x 46 x 20 cm
(28.7 x 18.1 x 7.9 in)

Discharge spout

42 cm (16.5   in)
70 cm (27.6   in)


Bag material 

Coated woven polypropylene fabric 

LDPE bag

Cover / protection 

LDPE shrink hood 

LDPE shrink hood 


Fumigated wood 

Fumigated wood

Pallet dimensions incl bags
(L x W x H)

105 x 105 x 143 cm
(41.3 x 41.3 x 56.3 in) 

120 x 100 x 140 cm
(47.2 x 39.4 x 55.1 in)