LOCTITE® SI 5367 is a silicone-based industrial sealant engineered to provide excellent adhesion to various substrates in applications where high heat tolerance is required (up to 250°C). It is available as a white paste formula with an acetoxy silicone base.
Appearance: White paste
Specific gravity @ 25°C: 1.04
Extrusion rate, g/min: 100
Shore hardness, ISO 868: 20
Elongation, at break, ISO 37, %: 500
Tensile strength, ISO 37 N/mm² (psi): 2 (290)
Dielectric breakdown strength kV/mm: 18
Primary Chemistry:
Acetoxy silicone
Conor Robertson, Technical Specialist
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LOCTITE® SI 5367 is an acetoxy silicone sealant from Henkel with a room-temperature vulcanizing cure. It is designed for a wide range of industrial applications with temperatures up to 250°C, offering superior performance due to its unique formulation. It exhibits excellent sealing, protecting, and bonding performance for heat exchangers, water heaters, ovens, steam circuits, electrical boxes, side windows in trains, and more. It forms a robust, flexible bond with an elongation of 500% and high-load-bearing capacity and shock absorption properties.
Degradation of seals at high temperatures
Poor flexibility of adhesive sealants in industrial applications
Sealing side windows in trains and heat sources (ovens, heat exchangers, steam circuits, water heaters)
Providing protection/insulation of electrical boxes
Bonding HCR silicones
General maintenance
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