LOCTITE SI 587 (Blue RTV Silicon) with part number 33965, known as Loctite 587 Blue Superflex, is a silicon paste containing Thixotropic Oxima which is applied to ormed-in-place gasketing and sealing applications for MRO and OEMs of various sizes. As a gasket sealant, this product is designed to provide excellent performance and withstands temperatures up to 260 degrees Celsius. Suitable for application for special automotive gaskets.