Applications

LOCTITE® 603 – Retaining Compound – Bonding of Cylindrical Fitting Parts

Item Name: LOCTITE® 603
Manufacturer: Henkel
Technologies: Acrylic (Urethane Methacrylate)
Color: Green Liquid
Cure Type: Anaerobic, Secondary Cure with Activator
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® 603 is a high-strength anaerobic retaining compound designed for bonding cylindrical fitting parts, especially where surface cleanliness is not assured. It prevents loosening and leakage due to shock and vibration. The product fluoresces under UV light and offers a secondary cure with an activator. It is NSF P1 registered for use in food processing areas where there is no food contact.

2. Applications

  • Retaining roller bearings and oil-impregnated bushings in housings.
  • Bonding cylindrical metal parts.
  • Used in slip, press, and shrink-fit assemblies.

3. Typical Properties

Uncured Properties

Property Value
Appearance Green liquid
Specific Gravity @ 25°C 1.1
Viscosity (Brookfield RVT, 25°C, Spindle 1, 20 rpm) 100 – 150 mPa·s (cP)
Flash Point See SDS

Cured Properties

Property Value
Coefficient of Thermal Expansion (ISO 11359-2) 80×10⁻⁶ K⁻¹
Thermal Conductivity (ISO 8302) 0.1 W/(m·K)
Specific Heat 0.3 kJ/(kg·K)

Performance After Curing (ISO 10123, 24h @ 22°C)

Property Value
Compressive Shear Strength (Steel) ≥22.5 N/mm² (3,260 psi)
Compressive Shear Strength (Steel, 30 min @ 22°C) ≥13.5 N/mm² (1,960 psi)

Environmental Resistance (1 week @ 22°C, ISO 10123)

Environment Temperature (°C) 100h 500h 1000h
Motor Oil (MIL-L-46152) 125 100% 100% 100%
Unleaded Petrol 22 100% 90% 85%
Brake Fluid 22 100% 90% 80%
Water/Glycol 50/50 87 100% 90% 80%
Ethanol 22 100% 100% 75%
Acetone 22 90% 90% 90%

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