EVERBUILD Ever Flex Silicone 450 Premium+ Builders Silicone White 300ml

EVERBUILD Ever Flex Silicone 450 Premium+ Builders Silicone White 300ml is a premium quality, low modulus, non-corrosive neutral cure silicone sealant manufactured by Sika Limited. Engineered for both trade professionals and demanding DIY projects, it bonds to virtually all porous and non-porous substrates without the need for priming, delivering a permanently flexible, weatherproof seal for interior and exterior applications.

Key Features and Specifications

• Type: Low modulus, neutral cure RTV silicone sealant
• Colour: White
• Volume: 300ml cartridge (standard gun-grade)
• Flexibility: ±25% movement accommodation
• Certification: Conforms to ISO 11600 Class F 25LM
• Adhesion: Bonds to glass, metals, plastics, wood, PVCu and polycarbonate — no primer required
• Plasticiser resistance: High resistance to plasticiser migration; compatible with water-based and solvent-based paints
• Cure time: Typically 24–48 hours (temperature and humidity dependent)
• Dirt pick-up: Low — particularly suited to PVCu window and door work
• UV stability: Excellent external weathering and UV resistance
• Brand / Manufacturer: EVERBUILD (Sika Limited)

Applications

• Perimeter pointing internally and externally around PVCu, timber and all other window and door frames
• Construction expansion joint sealing and movement joint sealing
• Weather sealing for parapets, roofs and pre-formed panels
• General glazing, glass-to-glass and glass-to-aluminium sealing
• Sealing and bonding PVCu plastic trims and components
• Bedding insulated glass units (in accordance with BS 8000 Part 7)
• Draughtproofing and repair work over existing sealant
• Sealing soft metals including lead, copper and zinc

Why Choose This Product

The EVERBUILD Ever Flex Silicone 450 Premium+ is a trusted specification-grade sealant used across the UK construction industry. Its neutral cure chemistry means it is non-corrosive to sensitive substrates such as copper and natural stone. The high-viscosity formulation tools easily for a clean, professional finish, and once cured it can be overpainted — a key advantage for joiners, window installers and general builders. Compliance with ISO 11600 F 25LM gives specifiers and contractors the confidence of a certified, performance-tested product.

Delivery in and Around London

We deliver the Everbuild Everflex 450 Premium+ Builders Silicone White 300ml to all London boroughs, including Croydon, Lewisham, Southwark, Camden and Hackney, as well as Greater London areas such as Enfield, Bexley, Redbridge and Barnet. We also supply to the surrounding counties of Kent, Essex, Surrey and Hertfordshire. Trade quantities and bulk orders are welcome. Order before midday on weekdays for same-day despatch.