Dow Corning Dowsil 781 Colour Acetoxy Glazing Silicone Sealant 310ml

Dow Corning Dowsil 781 Acetoxy Medium to High Modulus HM Glazing and Non-Porous Silicone Sealant 310ml

Available Colours: White Black Grey Brown Aluminium Clear.

Size: 310ml Cartridge

Dow Corning 781 is a silicone sealant which offers fast cure and good weathering characteristics.

The Dow Corning Dowsil 781 Colour Acetoxy Glazing Silicone Sealant is a high-performance, professional-grade silicone sealant designed for glazing, weatherproofing, and general construction applications.This fast-curing, flexible, and durable sealant provides exceptional adhesion to glass, metal, ceramics, and non-porous surfaces, making it an essential choice for glazing professionals, contractors, and builders.Formulated with acetoxy-cure technology, Dowsil 781 delivers a strong and permanent bond while offering excellent resistance to UV rays, weathering, and temperature fluctuations.Available in a variety of colours, this sealant is ideal for internal and external applications, providing a long-lasting, waterproof, and aesthetically clean finish.

Dowsil 781 has excellent adhesive properties and is suitable for use on aluminium, glass, Formica, and most other non-porous surfaces, glazing applications, weather sealing of sheet cladding, curtain walls, draught proofing and general internal sealing applications.

Dow Dowsil 781 Benefits:

High modulus acetoxy fast cure tack free in one hour, + or 25% Joint movement capability with 5 to 10 minutes Working time and 100% recovery, has excellent weather ability + 5 to + 40 degree C application temperature range, Listed by the UK Water Fittings Bye laws Scheme for use in contact with potable water once cured conforms to ISO 11600-G-20 HM.

Features and Applications

• High-Performance Glazing Sealant: Specially designed for glass-to-glass and glass-to-metal sealing, not suitable for contact with sealed units.
• Fast Curing and Flexible: Quickly skins over and remains permanently flexible for movement accommodation.
• Weather and UV Resistant: Provides long-term durability in outdoor environments.
• Mould and Mildew Resistant: Ensures hygienic and clean applications in wet or humid conditions.
• Excellent Adhesion: Bonds well to glass, aluminium, steel, ceramics, and other non-porous materials.
• Wide Colour Selection: Available in various colours to match different glazing and construction projects.

How to Use Dow Corning Dowsil 781 Colour Acetoxy Cure Silicone Sealant

1. Surface Preparation: Ensure surfaces are clean, dry, and free from dust, grease, and contaminants.
2. Apply the Sealant: Cut the nozzle at an angle and apply a continuous bead of sealant using a standard sealant gun.
3. Tool the Joint: Use a smoothing tool or soapy water to achieve a professional finish.
4. Allow to Cure: The sealant will skin over in approximately 5 to 10 minutes and fully cure within 24 hours depending on humidity and temperature.

Specifications

• Brand: Dow (Dowsil)
• Product Name: Dowsil 781 Colour Acetoxy Silicone Sealant
• Cure Type: Acetoxy
• Skin Over Time: Approximately 15 minutes
• Full Cure Time: 24 hours(varies based on conditions)
• Application Surface: Glass, metal, ceramics, non-porous materials
• Weather Resistance: UV-resistant, waterproof, and flexible

Frequently Asked Questions

1.Why choose an acetoxy-cure silicone sealant like Dowsil 781? Acetoxy-cure silicone sealants, such as Dowsil 781, provide fast curing times, excellent adhesion, and superior weather resistance.They offer long-term flexibility, making them ideal for glazing and structural applications where durability is key.

2.Can this sealant be painted over? No, silicone-based sealants cannot be painted over.If a paintable sealant is required, consider using a hybrid or acrylic-based alternative.

3.How long does this sealant last once applied? Dowsil 781 offers long-term performance and durability.When applied correctly, it provides a permanent, flexible, and weatherproof seal for many years.

4.Can this sealant be used for external applications? Yes, this sealant is UV-resistant and fully weatherproof, making it ideal for external glazing, facade sealing of non porous surfaces.

Dowsil 781 Colours:

• 3295231 - White
• 3295257 - Black
• 3295265 - Grey
• 3295249- Brown
• 3295281 - Aluminium
• 3295036 - Clear

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