SIDISHIELD® for paints & coatings

SIDISHIELD® allows higher solid content, improving abrasion and scratch resistance, and acts as a spacer agent.


SIDISHIELD® C25 is a specially designed light-coloured coating additive consisting of spherical, submicron particles of amorphous silicon dioxide. The nature of the product allows excellent dispersion of these particles in the coating polymer matrix and combined with the low surface area it is possible to achieve higher solid content coatings, maintaining good levelling properties with abrasion and scratch resistance. 


SIDISHIELD® C25 has been designed for usage in all types of coating systems: solvent free, waterborne, and solvent based, including UV and powder coatings. SIDISHIELD® C25 can, due to its hardness and physical shape, act as a dispersing agent and is also used as a spacer in pigment concentrates.

Recommended addition level is 1 - 2% of total formulation.

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
Fe2O3 (Iron oxide) ESM-LAB-17 % ≤ 0.20
H2O (Moisture, when packed) ESM-LAB-02 % ≤ 0.8
Loss on Ignition (L.O.I.) @ 950o C ESM-LAB-03 % ≤ 0.50
pH-value (fresh) ESM-LAB-10   7 - 9
Bulk Density (when packed) ESM-LAB-08 kg/m3 150 - 300


Other properties (Measured on undensified material)UnitTypical values*
Specific surface area (BET) m2/g 18 - 25
Primary particle size (mean value) μm 0.15
L-value % ≥ 90
Specific Gravity   2.2
Oil number g/100g ca 60

*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 40 small bags
Net weight 1 bag 400 kg 15 kg
Net weight on pallet 400 kg (881 lb) 600 (1323 lb)
Gross weight

400 + 20 = 420 kg (881 + 44 = 925 lb)

600 + 20 = 620 kg (1323 + 44 = 1367 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

Multilayer paper bag with PE liner

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 147 cm (41.3 x 41.3 x 57.9 in)

120 x 100 x 180 cm (47.2 x 39.4 x 70.9 in)