Silicon hybrid sealants for porous substrates

DOWSIL™ 789-P Silicone Hybrid Sealant is a monocomponent hybrid sealant suitable for sealing joints in porous substrates. It is tailor-made to provide a weather sealing solution when over-paintability, low dirt pick-up and low staining is required. It is easy to use: has excellent extrudability and toolability and can be used for quick and aesthetic joint seal applications. 

DOWSIL™ 789-P Sealant is one-part, neutral curing sealant particularly suitable for exterior applications such as pre-cast panel joints, expansion joints and weather seals for concrete, masonry, bricks, stone or wood façades. It conforms to EN 15651-1, 2&3. It does not contain any solvents and any free isocyanate compounds. It can be painted over after 3-7 days.

Major applications 

DOWSIL™ 789 P is one-part, neutral curing sealant particularly suitable for exterior applications such as:Panel joints; Expansion joints; Weather seals for concrete, masonry, bricks, stoneor wood façades.

Key features and benefits

• Does not contain any solvents
• Does not contain free isocyanate
• compounds
• Good unprimed adhesion to most porous substrates
• Neutral cure
• Conform to EN 15651-1,2&3
• Can be painted over after 3 to 7 days
• Low staining
• Low dirt pick-up
• Excellent paintability with waterbased and synthetic paints
• Universal suitable for building, sanitary and glazing joint sealing
• Interior and exterior

Technical performance parameters

• Non corrosive towards metals
• No shrinkage and bubble-free
• Good resistant to UV, weather and water
• Excellent tooling properties
• Adheres perfectly without primer on most common building materials
• Excellent tool ability even at low temperature
• Conform to EN 15651 –25 HM
• Develops quickly a tack-free surface inless than 90min
• Generally good adhesion of facade paints on the sealant 

For further information, visit: www.dow.com/construction