WP100 Silicone Sealant Seal Rapid Cure Mastic External Door Windows White 300ml Description: A premium, single component, moisture curing, neutral cure silicone sealant. Conforms to EN15651‐1,3 F EXT‐INT, G, XS2. Benefits: w Permanently elastic. w Weatherproof. w UV stable colours. w Suitable for alkaline and metal surfaces. w Anti‐fungal. Suitable for use as a perimeter sealant for external door and window frames. It has good adhesion properties with a rapid curing rate. Uses For perimeter sealing of wood, aluminium and PVCu door and window frames and for weather sealing and flexible jointing of infill panels. For building and construction joints and joints between different materials with high movement. Preparation Ensure all surfaces are clean, dry and free .