Dow Corning 791 Silicone


Dow Corning® 791 Silicone Weather proofing Sealant is a one-part, neutral cure, architectural grade sealant. It easily extrudes in any weather and cures at ambient temperature by reaction with moisture in the air to form a durable, flexible silicone rubber seal.



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  • Ideal for expansion, connection, perimeter and other movement joints
  • Neutral cure – suitable for use on coated glass, galvanized steel, masonry and other porous and nonporous substrates
  • Extension/compression movement capability of up to ±50 percent of the original joint width


  • Excellent weatherability, virtually unaffected by sunlight, rain, snow, ozone
  • Excellent unprimed adhesion to a wide variety of construction materials and building components
  • Ease of application – ready to use as supplied
  • Excellent rheology, low string upon gunning


  • One-part, neutral-cure, RTV silicone sealant