Dow Corning 796 Construction Sealant

Neutral-Cure Silicone Sealant for Windows, Doors & Brickwork. Dow Corning 796 (also known as DOWSIL™ 796) is a one-part, low-modulus, neutral-curing silicone sealant ideal for exterior perimeter sealing. It delivers excellent adhesion to PVC-u, aluminium, wood, glass, and brickwork—making it perfect for weatherproofing window and door frames, glazing joints, and brick-to-frame interfaces.. Key Features & Benefits. Neutral Cure: Non-corrosive and safe for sensitive materials like sealed glass—no primer needed in many cases.. Low Modulus & Highly Elastic: Accommodates up to ±25 % joint movement.. Excellent Adhesion: Bonds to PVC-u, aluminium, painted surfaces, masonry, and glazed areas—without priming.. Fast Skin-Over Time: Forms a skin in approximately 15 minutes and is tack-free in around 35 minutes at 23 °C/50 % RH.. Durable & Weather-Resistant: Excellent resistance to UV, ozone, and extreme temperatures.. Compliant with Standards: Meets ISO 11600 F&G Class 25 LM, and other international specs.. Typical Technical Properties. Application Temp: +5 °C to +40 °C (41–104 °F). Specific Gravity: ~1.52. Elongation at Break: ~700 %. Movement Capability: ±25 %. Common Applications. Weather-sealing PVC-u, aluminium, and wood frames. Sealing around glazing and window perimeters. Sealing brickwork to frames and other construction substrates. Installation Tips. Ensure substrates are clean, dry, and free of contaminants.. Apply a continuous bead, tooling within skin-over time for best adhesion.. Avoid using on substrates sensitive to alcohols (by-products of cure).