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Dow Corning ® 791 Weatherproofing Silicone Sealant
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Dow Corning 791 is a low modulus one-part silicone sealant that gives excellent unprimed adhesion to both porous and non-porous construction substrates.
MAIN USES:
For weathersealing of curtain walling, building facades and expansion joints. Also suitable for use as a frame sealant.
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

Dow Corning ® 781 Acetoxy Silicone Sealant
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Dow Corning 781 is a one component, ready-to-use silicone sealant, which offers fast cure and good weathering characteristics. The excellent adhesive properties of Dow Corning 781 make it suitable for use on aluminum, glass, formica, and most other non-porous surfaces.
MAIN USES:
Suitable for glazing applications, weathersealing of sheet cladding, curtain walls, draught proofing and general internal sealing applications.
Conforms to ISO 11600-G-20HM
High modulus – acetoxy cure type
Listed by the UK Water Fittings Byelaws Scheme for use in contact with potable water once cured
Fast cure – tack free in one hour
Joint movement capability +/– 25%
Working time of 5-10 minutes
100% recovery
Excellent weatherability
Application Temperature Range +5 to +40°C