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LOCTITE STYCAST 82 SIRSW1 – Silicone Syntactic Foam – Bonding lightweight molded parts and thermal barriers for aerospace applications

  • Item Name: LOCTITE STYCAST 82 SIRSW1
  • Manufacturer: Henkel Corporation
  • Product category: Silicone encapsulant adhesive (syntactic foam)
  • Technologies: Lightweight syntactic foam using microballoons for high temperature resistance and low thermal conductivity
  • Applications: Ideal for bonding lightweight molded parts and thermal barriers in aerospace applications
  • Color: Black
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 183 days (when stored at 18 to 25°C)

1. Product Overview

LOCTITE STYCAST 82 SIRSW1 is a lightweight syntactic foam designed for aerospace applications requiring high strength, high elongation, and lightweight properties. It contains special microballoons, enabling high compressive load resistance and suitability for moderate shear processing.

  • Technology: Silicone
  • Appearance: Black
  • Components: Two-component (Part A & Part B)
  • Mix Ratio (by weight): 10:1
  • Cure Method: Heat cure
  • Operating Temperature:
    • Continuous: -50°C to +260°C
    • Intermittent: -50°C to +315°C
  • Key Benefits:
    • Lightweight
    • Ease of use
    • Low thermal conductivity
    • High temperature resistance
    • Non-corrosive
    • Can be cured in thick sections

2. Applications

  • Assembly bonding
  • Aerospace applications
  • Bonding lightweight molded parts
  • Thermal barriers

3. Typical Properties

Uncured Properties
Property Part A Part B Mixed
Viscosity @ 25°C (mPa·s) 375,000 2,350 240,000
Pot Life @ 25°C (hours) 4
Shelf Life @ 18-25°C (days) 183
Curing Performance
Cure Schedule Condition
Primary Cure 2.25 hours @ 150°C
Post Cure 1 hour @ 200°C
Cured Properties
Property Value
Hardness (Shore A) 60
Tensile Strength (N/mm²) (psi) 1.85 (268)
Tensile Elongation (%) 157.5
Thermal Conductivity (W/m-K) 0.163
Coefficient of Linear Thermal Expansion (ppm/°C) 185
Dry Heat Resistance (Shore A max) 65
Weight Loss (%) (max) 4
Performance Characteristics
Property Minimum Value
Tensile Lap Shear Strength (N/mm²) (psi) 1.0 (145)

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