Dowsil Sealant Categories

Dowsil Sealant

Our Range of Dowsil Sealants and Adhesives

Our range of Dowsil sealants represents some of the most trusted silicone-based solutions in the construction and building maintenance industries. As the world's leading manufacturer of silicone products, Dowsil (formerly Dow Corning) brings decades of research and development expertise to every cartridge. We stock an extensive selection of their professional-grade silicone sealants, each formulated for specific applications where performance, durability and reliability are non-negotiable.

At the heart of our Dowsil collection are specialist silicone sealants engineered for demanding environments. The Dowsil 791 Weatherproof Outdoor Silicone Sealant delivers exceptional weather resistance for external applications, whilst the Dowsil 786 Food Grade Silicone Sealant meets stringent hygiene standards for commercial kitchens and food preparation areas. For glaziers and window fitters, we stock the Dowsil 799 Glaze and Go Neutral Silicone Sealant and Dowsil 784 Glazing Sealant, both designed for professional glass installation. Our range also includes the bacteria-resistant Dowsil 785+ for bathroom environments, the versatile Dowsil 781 and 785N neutral silicone sealants for general applications, the Dowsil 817 Silicone Mirror Adhesive for secure mirror mounting, and the Dowsil Firestop 400 Intumescent Acrylic Sealant for fire protection sealing requirements.

What distinguishes Dowsil sealants from competitors is their unwavering commitment to performance consistency. Every product in our range has been rigorously tested to deliver predictable results across varying environmental conditions, substrate types and application methods. Whether you're sealing expansion joints on a high-rise facade, installing shower enclosures in luxury bathrooms, or maintaining food production facilities, Dowsil offers a scientifically-developed solution that tradespeople can specify with confidence.

About Dowsil

Dowsil was established in 1943 as Dow Corning, a joint venture between Dow Chemical Company and Corning Glass Works in Midland, Michigan, USA. The company was founded specifically to explore and develop the commercial potential of silicone compounds, which were then an emerging material technology. During World War 2, the company supplied critical silicone products to the US military, establishing their reputation for innovation and reliability under demanding conditions.

Over the following decades, Dow Corning became the world's largest producer of silicone-based products, developing applications across construction, automotive, electronics, healthcare and countless other industries. In 2018, the company underwent a significant rebranding, with its construction sealants and adhesives portfolio being rebranded under the Dowsil name. This change reflected the company's evolution whilst maintaining the same rigorous standards and proven formulations that professionals had trusted for over seven decades. Today, Dowsil continues to operate as part of Dow Inc., maintaining research facilities and manufacturing operations worldwide, with their construction sealants remaining the benchmark against which other products are measured.

Who Uses Dowsil Sealants?

• Glaziers and window fitters installing UPVC, aluminium and timber frames
• Bathroom fitters and plumbers sealing sanitaryware, showers and wet rooms
• General builders requiring weatherproof external sealing solutions
• Shopfitters installing mirrors, glass partitions and display fixtures
• Commercial kitchen installers working in food preparation environments
• Maintenance contractors managing commercial and residential properties
• Facade specialists sealing curtain walling and cladding systems
• Fire protection contractors installing fire-rated sealing systems
• Conservatory installers working with glass and polycarbonate structures
• DIY enthusiasts tackling bathroom, kitchen and window projects

Why Choose Dowsil Sealants?

Choosing Dowsil sealants means investing in products backed by over 75 years of silicone technology expertise. The brand's reputation amongst professional tradespeople rests on consistent quality—every cartridge performs predictably, cures reliably and delivers the longevity that makes callbacks a rarity rather than a routine concern. This consistency matters enormously on commercial projects where material failure can result in costly remedial works and damaged professional reputations.

Dowsil's commitment to developing application-specific formulations ensures you're using the right product for each job. Rather than offering generic "all-purpose" sealants that compromise performance, Dowsil engineers dedicated solutions—neutral cure formulations that won't corrode sensitive metals, bacteria-resistant compounds for hygiene-critical environments, and food-grade options that meet stringent regulatory requirements. This specialisation translates directly into superior long-term performance and compliance with building regulations and industry standards.

Professional tradespeople also value Dowsil's extensive technical support and documentation. Comprehensive product data sheets, application guides and compatibility information help ensure correct product selection and installation techniques. When you're specifying sealants for projects with 10, 20 or 30-year performance expectations, this level of technical rigour provides invaluable peace of mind for both installers and end clients.

Perfect for Your Job

Dowsil sealants excel across diverse applications where durability and performance are essential. External weatherproofing applications benefit from the UV resistance and movement accommodation of the 791 Weatherproof formula, making it ideal for sealing window perimeters, door frames, expansion joints and external cladding details exposed to British weather conditions.

In bathroom and wet room installations, the bacteria-resistant properties of Dowsil 785+ help maintain hygienic surfaces around baths, showers, basins and sanitaryware, whilst its neutral cure formulation prevents corrosion of chrome fittings and frames. The versatile 781 and 785N neutral silicone sealants handle general glazing, construction joints and internal sealing applications across residential and commercial projects.

Specialist applications are equally well-served. The 786 Food Grade Sealant meets regulatory requirements for commercial kitchens, food processing facilities and catering environments. The 817 Mirror Adhesive provides secure, long-lasting mirror installation without risk of silvering damage. The 799 Glaze and Go formula offers rapid skinning times for high-productivity glazing work, whilst the Firestop 400 Intumescent Sealant delivers essential fire protection in compartmentation and penetration sealing applications, helping meet Building Regulations Part B requirements.

Types of Dowsil Sealants

Neutral Cure Silicone Sealants

Our selection includes the Dowsil 781, 785N and 785+ formulations—neutral cure silicones that won't corrode metals, damage sensitive substrates or emit strong odours during curing. These are the preferred choice for applications involving aluminium, coated metals, mirrors, natural stone and sanitaryware.

Weatherproof External Sealants

The Dowsil 791 Weatherproof Outdoor Silicone Sealant is specifically engineered for external exposure, offering exceptional UV resistance, weather durability and movement accommodation for facade sealing, perimeter pointing and external joint applications.

Specialist Application Sealants

Dowsil's specialist range addresses specific professional requirements: the 786 Food Grade for hygiene-critical environments, the 799 Glaze and Go for high-speed glazing operations, the 784 for professional glass installation, the 817 Mirror Adhesive for secure mirror mounting, and the Firestop 400 intumescent acrylic for fire protection sealing.

Frequently Asked Questions

Is Dowsil a good brand?

Dowsil is widely regarded as one of the premium sealant brands in the construction industry. As the world's largest silicone producer with over 75 years of experience, their products are trusted by professional tradespeople for critical applications where performance and longevity are essential. The brand's reputation for consistency and reliability makes it a preferred specification for commercial projects.

Where are Dowsil products made?

Dowsil operates as part of Dow Inc., with manufacturing facilities located worldwide including in the United States and Europe. The company maintains strict quality control standards across all production sites to ensure consistent product performance regardless of manufacturing location.

What's the difference between Dow Corning and Dowsil?

Dowsil is the rebranded name for Dow Corning's construction sealants and adhesives range, introduced in 2018. The products remain the same proven formulations that professionals have trusted for decades—only the branding has changed. If you've previously used Dow Corning sealants, the equivalent Dowsil products offer identical performance.

How long do Dowsil silicone sealants last?

When correctly applied to properly prepared substrates, Dowsil silicone sealants typically provide service life expectancy of 20+ years in most applications. External weatherproof formulations like the 791 are specifically designed to resist UV degradation and weathering throughout their service life.

Are Dowsil sealants suitable for food preparation areas?

Yes, the Dowsil 786 Food Grade Silicone Sealant is specifically formulated to meet regulatory requirements for direct and indirect food contact, making it suitable for commercial kitchens, food processing facilities and catering environments where hygiene standards are critical.