LOCTITE SI 587 is a high-performance, one-component, blue RTV silicone sealant designed for gasketing, sealing, and flange applications. It cures at room temperature when exposed to atmospheric moisture and forms a tough, flexible silicone rubber that provides reliable sealing against water, oils, vibration, and temperature fluctuations.
LOCTITE 587 is particularly suitable for applications where a flexible, chemically resistant seal is required. It can be used to form or replace conventional gaskets on properly prepared metal and other compatible surfaces. Its excellent flexibility helps accommodate thermal expansion and contraction while maintaining a dependable seal.
The product is commonly used in automotive, machinery, industrial equipment, pumps, gearboxes, engine components, covers, housings, and flange assemblies. The blue formulation also makes the sealant easy to identify during assembly and maintenance.
Key Features:
One-component, ready-to-use RTV silicone
Blue silicone formulation
Excellent flexibility and vibration resistance
Suitable for gasket forming and flange sealing
Good resistance to moisture, oils and environmental conditions
Helps seal irregular or machined flange surfaces
Cures at room temperature
Suitable for maintenance, repair and assembly applications
Available in a 300 ml cartridge format
Typical Applications:
Engine and transmission covers
Gearboxes and housings
Pumps and compressors
Flanges and machine assemblies
Automotive and industrial equipment
Replacement of conventional formed-in-place gaskets
Sealing joints exposed to vibration and thermal cycling
Temperature Resistance:
LOCTITE SI 587 is designed for high-temperature sealing applications and can withstand temperatures up to approximately 260°C (500°F), depending on the application and service conditions.
Important: Surface preparation, joint design, curing conditions and chemical exposure can affect final performance. Always verify compatibility and the latest technical specifications in the applicable Henkel Technical Data Sheet before use