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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

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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