Synthetic, hydrophilic, amorphous silica, produced via flame hydrolysis. Standard product for industrial applications.


White colloidal powder of high purity.


All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.

HDK® V16D is applied as a thickening and thixotropic agent in silicone sealants.

HDK® V16D is not suitable for pharmaceuticals, food and feed.

A good dispersion of HDK® V16D is a must to assure optimum performance.
More detailed information about the application and processing of HDK® V16D is available in our HDK-brochures and on the WACKER web site


HDK® V16D is offered in following packaging:

  • pallet with paper bags: 15 kg bags
  • Big bags: 180 kg (big bags on pallets)
  • Silotruck: depending on size of truck, approx. 5 tons


The 'Best use before end' date of each batch is shown on the shipping label and the certificate of analysis.HDK® V16D should be stored in the original packaging in dry storage areas.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
Due to the high surface area HDK® adsorbs volatiles and should be protected from humidity and volatiles. If single bags are taken away from an original pallet, the remaining bags of this pallet must again be protected against humidity and volatiles.

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

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BET surface
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HDK® H21 170 - 230 m²/g[2] 170 - 230 m²/g[2]
HDK® V15 130 - 170 m²/g[3] 130 - 170 m²/g[3]
HDK® V15A 130 - 170 m²/g[3] 130 - 170 m²/g[3]
HDK® V15D 130 - 170 m²/g[3] 130 - 170 m²/g[3]
HDK® V16 130 - 170 m²/g[3] 130 - 170 m²/g[3]
HDK® V16D 130 - 170 m²/g[3] 130 - 170 m²/g[3]
[1] BET surface | DIN ISO 9277 DIN 66132 | of the hydrophobic silica,  [2] BET surface | DIN ISO 9277 DIN 66132 | of the hydrophilic silica,  [3] BET surface | DIN ISO 9277 DIN 66132 


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