Glazing Silicone
(3 Products)Glazing Silicone provides a high-performance, flexible sealing solution for internal and external glazing applications. Part of the specialist Everbuild range, this acetoxy-cure sealant is engineered to provide a permanently watertight and weatherproof seal around glass, aluminium, and PVCu frames, ensuring long-term protection against the elements.
Understanding Glazing Silicone
Glazing Silicone is specifically formulated to meet the demanding requirements of window and door installations. Unlike general-purpose sealants, this glazing-grade material offers exceptional adhesion to non-porous surfaces such as glass and glazed ceramics. It remains permanently elastic after curing, allowing it to accommodate the thermal expansion and contraction of window frames without losing its bond or cracking.
The formulation features a fast-cure acetoxy system that skins over quickly, providing immediate protection against rain and wind-driven moisture. It contains a powerful antifungal compound to prevent mould growth in areas of high humidity, making it equally effective for internal glazing beads and external perimeter seals. Its high modulus nature provides structural support to the glass while maintaining a sleek, professional finish.
This Everbuild range is supplied in 295ml cartridges, designed for use with standard sealant applicators. To ensure a seamless match with common architectural finishes, the range is available in three distinct colours: Clear, for a discreet translucent finish; White, to match standard PVCu profiles; and Black, for contemporary aluminium or dark-framed systems.
Material Range
- Everbuild Glazing Sealant: A professional-grade, high-modulus silicone available in 295ml cartridges. Available in Clear, White, and Black to suit various frame materials and aesthetic requirements.
Performance Benefits
- Weather Resistance: Excellent resistance to UV radiation, ozone, and extreme temperature fluctuations.
- Watertight Seal: Provides a durable, impermeable barrier against water ingress in exposed glazing units.
- Antifungal Properties: Contains a fungicide to resist mould and mildew growth in damp environments.
- Flexibility: High movement accommodation ensures the seal remains intact during the natural shifting of the building fabric.
Typical Applications
- Perimeter Sealing: Creating a weatherproof barrier between window or door frames and the external wall structure.
Top-Facing Glazing: Sealing glass panes into timber, metal, or plastic frames and uPVC sections. - Internal Draught-Proofing: Closing gaps around internal glazing beads and window sills to improve thermal efficiency.
- General Maintenance: Repairing failed seals in existing conservatories, greenhouses, and shopfronts.
Specification & Standards
- BS EN ISO 11600: Building construction - Jointing products - Classification and requirements for sealants.
- BS 5889: Specification for one-part gun grade silicone sealants.
- ISO 8339: Determination of tensile properties (Extension-to-break) for glazing sealants.
Related Materials and Construction Uses
Glazing Silicone is typically applied after the physical installation of the glass unit using glazing shovels and packers. For the best results, surfaces should be de-greased using a specialist glass or solvent cleaner. It is often used in conjunction with glazing tapes or foam strips to ensure the correct joint depth is maintained. Once applied, the sealant can be smoothed using a jointing tool and a finishing spray to achieve a neat, concave bead that facilitates water run-off.
Frequently Asked Glazing Silicone Questions
How Long Does Glazing Silicone Take To Cure?
Cure time depends on formulation, temperature, and humidity. Most glazing silicones skin within 5-20 minutes and cure at approximately 2-3mm per 24 hours. Full cure is required before exposure to significant movement or loading.
Can Glazing Silicone Be Used Externally?
Glazing silicone is suitable for internal and external use where specified for UV and weather resistance. High-quality formulations maintain elasticity under temperature fluctuation and comply with durability classifications defined in EN 15651.
How Should Glazing Silicone Be Applied?
Joints should be clean, dry, and correctly sized with appropriate backing material such as polyethylene backer rod to control sealant depth. Application should follow a 2:1 width-to-depth ratio where possible to accommodate movement and maintain performance.
