For external sealing jobs, try Evo-Stik's weatherlock frame silicone. The tough, neutral-cure sealant is ideal for sealing around the outer side of windows and is CE-marked for frames and glazing. Designed for use with the outside elements, this silicone sealant resists UV and has mould-resistant properties.
Weatherlock sealant has been air tightness-tested to EN 1026 standards, helping to keep those windows perfectly sealed. The Evo-Stik silicone has also been pressure washer tested to 1,400 psi, so you can be confident that it will withstand all weathers (and the window cleaner's equipment).
The performance sealant is highly flexible, allowing some level of movement. Although it's designed to cope with a robust outdoor working life, you can also use Weatherlock frame silicone for the inside of the windows. Evo-Stik is part of Bostik, the famous manufacturer of adhesives.
• High performance – tested to the extremes in all weathers
• Pressure washer tested to 1,400 psi
• Resists UV and mould
• Excellent flexibility
• Neutral cure
• Suitable for interior or exterior use
• EN1026 air tightness tested