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MG Chemicals 834FX - Flame Retardant Epoxy

Black Flexible Epoxy, Encapsulating & Potting Compound 834FX is a 2-part, flame-retardant, thermally conductive, fexible epoxy resin that provides extreme environmental, mechanical and physical protection for printed circuit boards and electronic assemblies. This product is designed for applications where minimizing the physical stress on components is critical. It is good in low temperature and arctic environments, and in applications that involve temperature cycling or rapid temperature changes. It provides the functionality of silicone, but with the durability and cost-effectiveness of epoxy.

Product Type: 2K (2 component) Sealant, Epoxy Sealant, Potting Compound

Compatible Substrates & Surfaces: Ceramic, Composites, Glass, Metal, Plastics

Cure Method: Air Dry

Chemical Family: Epoxy & Epoxy Derivatives

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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Key Attributes
  • Flexible and low modulus
  • Flame-retardant—meets UL 94V-0
  • Convenient 1A:1B volume mix ratio
  • Low exotherm
  • Good adhesion to a wide variety of substrates including metals, composites, glass, ceramics, and many plastics
  • Excellent electrical insulating characteristics
  • Non-halogenated flame-retardant fillers
  • Solvent-free
Recommended Preparation
Clean the substrate with Isopropyl Alcohol, MG #824, so the surface is free of oils, dust, and other residues.

Applications & Uses

Compatible Substrates & Surfaces
Cure Method

Properties

Flame Rating
Typical Properties
ValueUnitsTest Method / Conditions
Mix Ratio1:1Volume
Mix Ratio1:1Weight
Working Time2.5h
Cured Properties
ValueUnitsTest Method / Conditions
Breakdown Voltage48300V
Compressive Strength87N/mm2
CTE (After Tg)114ppm/˚C
CTE (Prior Tg)142ppm/˚C
Dielectric Strength386V/mil
Glass Transition Temperature (Tg)50°C
Hardness D81
Intermittent Temperature200˚C
Lap Shear (Aluminum)16N/mm2
Lap Shear (Stainless Steel)13N/mm2
Resistivity8.2 x 10¹²Ω·cm
Service Temperature Range-30 to 175˚C
Tensile Strength23N/mm2
Thermal Conductivity (at 25˚C)0.7W/(m·K)
Uncured Properties
ValueUnitsTest Method / Conditions
Mixed Density1.6g/mL
Viscosity (at 25 ˚C) ⁽ᵃ⁾8Pa·s
Viscosity (at 25 ˚C) ⁽ᵇ⁾16Pa·s
Cure Instructions

Allow to cure at room temperature for 24 hours, or cure in an oven at one of these time/temperature options:

Temperature 65 °C 80 °C 100 °C
Time 2 h 1 h 30 min

 

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Mixing
  1. Scrape settled material free from the bottom and sides of the part A container; stir the contents until homogenous. Use a paint shaker if available.
  2. Measure 2 parts by volume of the part A and pour into the mixing container. Ensure all contents are transferred by scraping the container.
  3. Measure 1 part by volume of the part B and pour into the mixing container. Ensure all contents are transferred by scraping the container.
  4. Thoroughly and gently mix parts A and B together. Avoid introducing air bubbles.
  5. To de-air, let sit for 15 minutes or put in a vacuum chamber at 25 inHg for 2 minutes.
  6. If bubbles are present at the top, break them gently with the mixing paddle.
  7. Pour the mixture into a container holding the components to be protected.
  8. Close the part A and B containers tightly between uses to prevent skinning.
Viscosity vs. Temperature

MG Chemicals 834FX - Flame Retardant Epoxy - Viscosity Vs. Temperature

Packaging & Availability

Available Packaging
Cat. No. Packaging Net Vol. Net Wt.
834FX-450ML 2 Bottle kit 450 mL 728 g
834FX-450ML 2 Can kit 1.7 L 2.75 kg

Storage & Handling

Shelf Life
5 Years
Storage and Handling
Store between 16 and 27 ˚C in a dry area, away from sunlight (see SDS).