The Everbuild 450 Builders Silicone Sealant is a premium quality, low modulus, neutral cure silicone sealant designed for a wide range of construction and sealing applications. It adheres to virtually all substrates, both porous and non-porous, without the need for priming. This sealant conforms to ISO 11600 class: F 25LM and BS5889 standards. It is formulated as a high viscosity grade for excellent tooling properties, curing quickly to provide a permanently flexible, high strength, waterproof seal. The low dirt pick-up is particularly beneficial for uPVC applications. It offers excellent flexibility (± 50%), high resistance to plasticiser migration, and superior external weathering properties. Ideal for perimeter pointing around uPVC and wood window frames, sealing and adhering to uPVC, plastic trims, and components. Suitable for expansion joint sealing, weather sealing, joint sealing to pre-formed panels, sealing soft metals like lead, copper, and zinc, general glazing, draught proofing, repair work over existing sealant, glass-to-glass and glass-to-aluminium sealing, and roof weather sealing applications. Available in a 310ml cartridge.