Home > Companies > Dow Silicones Belgium SPRL > DOWSIL™ 781 Acetoxy Silicone

781 Acetoxy Silicone Sealant is a one-part silicone sealant which has good adhesion to a range of non-porous surfaces including glass, aluminium, painted surfaces and composite boards. It is not recommended for use on porous substrates such as concrete, stone, marble or granite.


  • High strength.
  • Good elasticity.
  • Resistant to ozone, ultra-violet radiation and temperature extremes.
  • Excellent resistance to ageing, shrinkage, cracking and discolouring.


Conforms to ISO 11600 F&G 20LM

Standard product features




- At 23°C (73°F) and 50% RH:

  • Application temperature: 5–40°C.
  • Specific gravity: 1.02.
  • Extrusion rate: 220 g/minute.
  • Skin-over time: 14 minutes.
  • Cure rate (1 day/ 3 days): 3/ 5 mm.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-55-75/360 Silicone glazing compounds or sealants

Product specification

An important note about specifying



Dow Silicones Belgium SPRL


+32 64 888 000

Product reference

DOWSIL™ 781 Acetoxy Silicone

Manufacturer details

Parc Industriel - Zone C,
Rue Jules Bordet,
Seneffe, B-7180,
Tel +32 64 888 000
Fax +32 64 888 950
NBS Plus
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