For superior holding power and precision assembly, Loctite® 680 is the go-to high-strength retaining compound for bonding cylindrical metal components. This low-viscosity, methacrylate-based liquid adhesive is engineered to deliver maximum strength and reliability in close-fitting applications, preventing loosening and leakage caused by vibration, shock, or thermal cycling.

Loctite 680 cures anaerobically (in the absence of air) between metal surfaces to form a tough, permanent bond, offering 26 N/mm² shear strength and robust performance on both active metals (like mild steel) and passive substrates (such as stainless steel and plated surfaces). With a fixture time of just 4 minutes, it’s ideal for high-speed production or maintenance tasks that demand fast turnaround and consistent performance.

Certified to ANSI/NSF Standard 61, Loctite 680 is approved for use in commercial and residential potable water systems up to +82°C, ensuring safety and reliability in a wide range of applications. It also demonstrates excellent oil tolerance and high temperature resistance up to 180°C, making it suitable for motors, gears, bearings, and other critical components.

Key Features:

High-strength retaining compound for cylindrical metal assemblies
Fast fixture time: 4 minutes; full cure: 24 hours
Low viscosity (1300 mPa·s) for close-fitting precision bonding
Shear strength: 26 N/mm² for permanent, vibration-resistant retention
Prevents loosening and leakage under vibration and load
Works on active and passive metals – steel, stainless steel, plated surfaces
Certified to ANSI/NSF Standard 61 for potable water applications
Tolerates light oil contamination
Temperature resistant from –55°C to +180°C
Colour: Green

Specifications:

Brand: Loctite®
Model: 680
Type: High Strength Retaining Compound
Colour: Green
Size: 50 mL
Viscosity: 1300 mPa·s (low)
Fixture Time: 4 minutes
Full Cure Time: 24 hours
Shear Strength: 26 N/mm²
Temperature Range: –55°C to +180°C
Certification: ANSI/NSF 61 (potable water)

Fast, strong, and reliable — Loctite® 680 delivers professional-grade retention for cylindrical parts where strength and precision matter most.

SILASTIC H/D HM270 310G

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