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LOCTITE® 545 – Adhesive/Sealant – Thread Sealing

Item Name: LOCTITE® 545
Manufacturer: Henkel
Technologies: Acrylic (Methacrylate ester)
Color: Purple liquid
Cure Type: Anaerobic; Secondary Cure: Activator
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.

1. Product Overview

LOCTITE® 545 is an anaerobic acrylic-based thread-sealing adhesive designed for locking and sealing metal pipes and fittings. It prevents loosening and leakage caused by shock and vibration. The product offers lubricity for easy assembly. It cures in the absence of air between close-fitting metal surfaces.

2. Applications

  • Used for locking and sealing metal pipes and fittings.
  • Suitable for applications requiring resistance to vibration-induced loosening.
  • Can be used in hydraulic and pneumatic systems.

3. Typical Properties

Uncured Material

Property Value
Appearance Purple liquid
Specific Gravity @ 25°C 1.02
Viscosity (mPa·s) 9,000 – 20,000
Cure Mechanism Anaerobic
Secondary Cure Activator

Cured Material

Property Value
Coefficient of Thermal Expansion (K-1) 80×10⁻⁶
Thermal Conductivity (W/m·K) 0.1
Specific Heat (kJ/kg·K) 0.3
Breakaway Torque (M10 Steel Nuts & Bolts) 2 N·m (20 lb.in.)
Compressive Shear Strength (Steel Pins & Collars) ≥1.5 N/mm² (220 psi)

Environmental Resistance

Condition % Initial Strength Retained
Motor Oil (125°C) 100%
Unleaded Gasoline (22°C) 95-100%
Brake Fluid (22°C) 100%
Ethanol (22°C) 90%
Acetone (22°C) 95%
Water/Glycol 50/50 (87°C) 100%
E85 Ethanol Fuel (22°C) 90-120%
B100 Bio-Diesel (22°C) 80-85%
DEF (AdBlue®) (22°C) 115-120%

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