Low strength gasketing product for high temperature applications. Suitable for flexible flanges and gaps up to 1 mm. LOCTITE® SI 5920 is a low strength, silicone-based gasketing product. It is used on flexible flanges with machined or cast surfaces and is particularly suitable for high temperature applications up to 350°C. It can be applied in gaps measuring up to 1 mm and is used in electrical insulating applications.