Dowsil 791 Weather Proofing Silicone Sealant 310ml Cartridge

Dowsil 791 (formerly Dow Corning) is a premium, low-modulus neutral silicone engineered for high-performance weather sealing. Developed for use in residential, commercial, and industrial settings, this versatile sealant offers exceptional elasticity, making it the industry standard for joints that require significant structural flexibility.

Its advanced formula is designed to provide powerful, unprimed adhesion to a vast array of porous and non-porous surfaces, including masonry, metals, glass, and various plastics.

Why Choose Dowsil 791?

• Superior Elasticity: Accommodates up to +/- 50% movement, making it the ideal choice for expansion joints and structural movement.

• Neutral Cure Formula: A non-corrosive sealant that is safe for sensitive materials like aluminium, steel, and coated surfaces. It is also safe for use on sealed units as it will not degrade bonding glues or foils.

• Weather & UV Resistance: Formulated to withstand the harshest environments, resisting ozone, ultraviolet radiation, and extreme temperature fluctuations without cracking or fading.

• Diverse Compatibility: Bonds effortlessly to brickwork, concrete, stone, polycarbonate, and most common building substrates.

Versatile Applications

• Building Facades & Curtain Walls: Creates a durable, flexible weather barrier for large-scale external cladding.

• Perimeter Pointing: The perfect solution for sealing around window and door frames or rooflines.

• Expansion Joints: Specifically designed for joints that undergo thermal or structural shifts.

• Roofing & Waterproofing: Provides long-lasting protection for parapets and roof joints against water ingress.

Technical Specification