Sika Everbuild Everflex 450 Premium+ Silicone Sealant - 300ml White

Everbuild Everflex 450 Premium+ silicone sealant delivers a reliable, waterproof barrier for both indoor and outdoor projects. Its neutral cure formula ensures safe use on a wide range of building materials without causing corrosion or discoloration. Designed for expansion joints, the low-modulus sealant remains flexible with up to +/-25% movement, preventing cracks and maintaining a tight seal even as structures shift over time. The sealant adheres strongly to most substrates, including glass, metals, plastic, wood and PVCu window frames. It also works well with polycarbonate, acrylic and lead, offering low dirt pick-up for clean finishes. High resistance to plasticiser migration means the sealant can be applied over water-based or solvent-based paints without degradation. This versatility makes it a go-to choice for professional builders and DIY enthusiasts alike. The 300ml white tube provides enough material for typical window and door sealing tasks while remaining easy to dispense with a smooth applicator. Its neutral cure eliminates odor issues, creating a comfortable working environment. Whether you are repairing a leaky perimeter, installing new frames, or sealing joints in a renovation, Everflex 450 Premium+ offers a durable, flexible solution that stands up to weather, movement and everyday wear.