Dow Corning 791 Weatherproofing Silicone Sealant

Dow Corning 791 is a low modulus one-part silicone sealant that gives excellent unprimed adhesion to both porous and non-porous construction substrates.


  • Conforms to ISO 11600-25LM and also meets ISO specification 9047 class
  • 50% Excellent weathering characteristics, including resistance to ozone, UV radiation and temperature extremes
  • Joint movement capability +/- 50% 20-30 minutes working time
  • Fast cure - tack free in 2 hours
  • Application  temperature range -20 to +50°C

Main Uses

For weathersealing of curtain walling, building facades and expansion joints. Also suitable for use as a frame sealant.

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