LOCTITE® 680 Retaining Compound

LOCTITE® 680 Retaining Compound is a high-strength, low-viscosity green anaerobic-curing adhesive engineered for maximum efficacy in the assembly and attachment of cylindrical fitting parts. This industrial-grade adhesive permanently bonds slip-fitted joints, preventing costly loosening and leakage caused by shock and vibration. Whether you are securing shafts, gears, pulleys, or similar cylindrical parts, this premium retaining compound provides a robust, leak-proof seal on all metals—including passive substrates like stainless steel and plated surfaces.

Why Choose LOCTITE® 680?

• High-Strength Permanent Bond: Engineered specifically to securely fix cylindrical assemblies where regular mechanical fasteners might fail or slip.
• Low Viscosity Formula: Easily self-flows and penetrates minute gaps in close-fitting components for total surface coverage.
• Robust Primerless Curing: Cures effectively on both active metals (e.g., mild steel) and passive substrates (e.g., stainless steel) without needing a separate primer or cleaner.
• Contamination Tolerant: Maintains powerful adhesion performance even when minor surface contamination from oils or cutting fluids is present.
• UV Inspection Quality Control: Fluoresces under UV light, allowing installers to visually inspect joints for consistent coverage and quality control.

Technical Specifications

• Product Type: Anaerobic Retaining Compound
• Strength: High Strength
• Color: Green
• Container Size: 50ml
• Certifications: NSF/ANSI 61 Certified (up to 82°C / 179.6°F)

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces to remove loose debris, though the formula safely tolerates minor oil residues.
2. Apply: Apply several drops of the liquid retaining compound to the mating cylindrical surfaces.
3. Assemble: Assemble and slide the parts together as required. The formula will begin curing once it is confined between closely fitting metal surfaces in the absence of air.

Frequently Asked Questions (FAQ)

What is LOCTITE® 680 used for?

LOCTITE® 680 is a high-strength anaerobic retaining compound designed for bonding cylindrical fitting parts. It is specifically formulated to prevent assemblies like bearings, gears, and bushings from loosening or leaking due to heavy vibrational stress, shock, and thermal expansion.

Can LOCTITE® 680 be disassembled?

No, LOCTITE® 680 establishes a permanent high-strength bond. Disassembly typically requires localized heating to approximately 250°C (482°F) to degrade the anaerobic polymer matrix, accompanied by mechanical force while the components are still hot.

Does LOCTITE® 680 work on passive surfaces?

Yes. LOCTITE® 680 offers robust performance across a wide variety of metals. It is highly effective on active surfaces like mild steel as well as passive substrates such as stainless steel and plated surfaces without requiring a chemical activator or primer.

Is LOCTITE® 680 safe for drinking water applications?

Yes, LOCTITE® 680 is NSF/ANSI 61 certified, meaning it is approved for use in commercial and institutional potable water systems at temperatures up to 82°C (179.6°F).