LOCTITE MR 5923 is a commercial-grade, slow-drying liquid thread and gasket sealant engineered for maximum reliability across close-fitting parts, machined surfaces, and threaded connections. Specially formulated for heavy-duty industrial, aircraft, and marine applications, this dark reddish-brown viscous liquid changes to a pliable, tacky film through controlled solvent evaporation, ensuring a highly dependable seal for aviation and marine engines.
This high-performing dressing compound is designed specifically for tight-tolerance assemblies, maintaining excellent flexible setting properties and reliable chemical resistance under rigorous operating conditions.
Technical Specifications
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Product Name: LOCTITE® MR 5923™ Aviation Gasket Dressing Sealant (473ml)
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Viscosity: Flow similar to SAE 10 Motor Oil
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Color: Brown (Dark Reddish Brown)
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Curing Type: Air dry / Solvent evaporation
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Setting Type: Flexible setting / Pliable, tacky film
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Temperature Range: -54°C to +204°C
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Key Applications: Solid gasket dressing, close-fitting machined surfaces, threaded connections, aviation engines, and marine engines
Key Features & Benefits
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Engineered for Close Tolerances: Ideal for precision-machined flanges and low-clearance joint profiles.
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Extended Work Time: Slow-drying formula allows ample time for complex multi-bolt alignments and meticulous part positioning.
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Superior Fluid Resistance: Retains its full sealing and material properties in continuous contact with water, ethylene glycol, gasoline, motor oil, transmission fluid, and sea water.
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Flexible Assembly Integrity: Cures to a pliable film that absorbs structural vibration and thermal expansion without joint failure.
Directions for Use & Storage
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Surface Preparation: Remove all previous material from mating surfaces.
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Application: Remove cap and apply a uniform film using the integrated brush-top applicator. When utilizing as a gasket dressing, spread the product evenly with a spatula onto one side of the gasket, position it onto the assembly, coat the second side, and re-assemble.
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Operational Readiness: The assembly becomes operational after 4 hours of air drying; a full cure is effectively achieved after 24 hours.
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Clean-Up: Clean hands immediately with commercial hand cleaners. The cured sealant can be removed from metal surfaces using isopropyl alcohol; for long-term or high-temperature dried films, cover with alcohol and allow it to soften overnight.
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Optimal Storage: Store product in the unopened container in a dry location between 8°C and 21°C. Storage below 8°C or greater than 28°C can adversely affect product properties.
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General Usage Disclosures: This product is not recommended for use in pure oxygen and/or oxygen-rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials. For safe handling information, consult the Safety Data Sheet (SDS).
Frequently Asked Questions
What is the temperature range for LOCTITE MR 5923?
LOCTITE MR 5923 is typically used in rugged industrial environments with a continuous operating temperature range of -54°C to +204°C.
Is LOCTITE MR 5923 resistant to automotive and marine fluids?
Yes, this aviation gasket dressing retains its effective sealing properties when subjected to water, ethylene glycol, gasoline, motor oil, transmission fluid, and sea water.
How long does it take for LOCTITE MR 5923 to fully cure?
The assembly is safe to return to light operations after 4 hours of air drying, while a full cure is achieved after 24 hours of solvent evaporation.
Can this sealant be used as a standalone gasket or a dressing?
LOCTITE MR 5923 is optimized to function both as a standalone sealant for close-tolerance machined surfaces and threaded connections, and as a flexible dressing compound applied to solid gaskets.
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