Industries

LOCTITE® SI 5366™ – Acetoxy silicone adhesive sealant – Industrial bonding and sealing applications

  • Item Name: LOCTITE® SI 5366™
  • Manufacturer: Henkel
  • Product Category: Bonding/Sealing Agent
  • Technologies: Silicone (Acetoxy silicone)
  • Applications: Designed for bonding and sealing in industrial applications, including high-temperature environments up to 250 °C.
  • Color: Clear paste
  • Cure Type: Room temperature vulcanizing (RTV)
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: Contact Techniq VN for details.

1. Product Overview

  • Technology: Silicone
  • Chemical Type: Acetoxy silicone
  • Appearance (Uncured): Clear paste
  • Components: One-component, no mixing required
  • Cure: Room temperature vulcanizing (RTV)
  • Application: Bonding or sealing
  • Flexibility: Enhances load-bearing and shock-absorbing properties
  • Temperature Resistance: Up to 250°C

2. Applications

  • Sealing side windows in trains
  • Sealing heat sources (ovens, heat exchangers, water heaters)
  • Protection and insulation of electrical boxes
  • Bonding of HCR silicones
  • General maintenance in various industries

3. Typical Properties

Uncured Properties
Property Value
Specific Gravity @ 25°C 1.04
Extrusion Rate (g/min) 25-55
Flow (ISO 7390, mm) <2
Curing Properties
  • Tack-free time: 5 minutes (23±2°C, 50±5% RH)
  • Depth of cure: 4 mm in 24 hours
Cured Properties (After 7 days @ 25°C, 50% RH, 0.5 mm film)
Property Value
Shore Hardness (ISO 868, A) 25
Elongation at Break (ISO 37, %) 530
Tensile Strength (ISO 37, N/mm²) 2.5 (360 psi)
Electrical Properties
Property Value
Dielectric Breakdown Strength (kV/mm) 18
Volume Resistivity (Ω·cm) 1×10¹⁴
Dielectric Constant (1 MHz) 2.8
Adhesive Properties (Lap Shear Strength, ISO 4587)
Substrate Strength (N/mm²) Strength (psi)
Aluminum (1 mm thick, sand-blasted) 2 290
Environmental Resistance (Fluid Immersion at 22°C for 5,000 hours, 2 mm thick film)
Fluid Volume Swell (%) Tensile Strength Change (%) Elongation Change (%)
Sodium Carbonate (25%) -0.2 -12 -10
Sodium Chloride (25%) -0.1 0 0
Hydrochloric Acid (2%) -0.1 -8 -8
Lactic Acid (12%) 0.3 4 10
Citric Acid (12%) -0.1 -0.3 0
Soda (25%) -7 -15 -15
Bleach (Commercial) -1 -20 -15

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