Description

LOCTITE 640 is a high-temperature anaerobic adhesive designed for securing slip and press fit assemblies. This powerful adhesive provides strong bonding capabilities, making it ideal for applications in automotive and industrial settings where reliability and durability are critical.

This adhesive is a methacrylate ester-based retaining compound that excels in high-pressure environments. It restores fit to worn or out-of-tolerance assemblies while preventing surface corrosion. With a maximum service temperature of 400°F (204°C) and a low viscosity, LOCTITE 640 is particularly effective for large diameter components and active metals such as brass. Its slow curing properties allow for extended positioning time, ensuring precise application. The fixturing time on steel is approximately 2 hours, providing ample time for adjustments.

Key Features:

OEM-Approved Performance: Trusted by leading auto manufacturers and professionals in engine building and repair worldwide.
Strong, Reliable Adhesion: Medium-temperature anaerobic adhesive ensures secure bonding for slip and press-fit assemblies.
Exceptional Strength: Increases holding power by up to 3,200 PSI, enhancing durability and resistance in high-pressure conditions.
Corrosion Protection: Shields surfaces from corrosion and restores fit to worn or out-of-tolerance assemblies, extending component life.
High Heat Resistance: Performs effectively in extreme conditions, withstanding temperatures up to 350°F.
Fluorescent Detection: The product’s fluorescence allows for easy monitoring of application presence during use.
Max. Diametrical Clearance: Suitable for gaps up to 0.1 mm, ensuring compatibility with various assembly requirements.

LOCTITE 640 is an excellent choice for professionals and DIY enthusiasts alike, particularly in automotive and industrial applications where high-strength adhesion and temperature resistance are necessary. Its unique formulation and performance characteristics make it a reliable solution for restoring and securing assemblies, ensuring long-lasting results in demanding environments.