EPOCAST® 938-A3

EPOCAST® 938-A3 Epoxy Structural Syntactic Adhesive is a frozen, one-component, flame-retardant compound designed for reinforcing honeycomb structures. EPOCAST® 938-A3 Epoxy Syntactic features high compressive strength at 350°F (177°C). Once thawed, EPOCAST® 938-A3 Syntactic is a thixotropic paste that can be easily dispensed from the cartridge using suitable pneumatic dispensing equipment. EPOCAST® 938-A3 Syntactic is qualified to BMS5-21, Type 1 classes 1; SMS 116201, Type 2; RMS 027, Type X; and others.

RTU Product Type: 1K (1 component) Adhesive, Structural Adhesive, Syntactic Adhesive, Void Filler

Application Area: Aircraft Engine, Aircraft Exterior

Features: Flame Resistant, Good Compressive Strength, High Temperature Performance, Thixotropic

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Enhanced TDS

Identification & Functionality

Blend
No
Function
Syntactic Adhesive,Intermediate,Reactive Diluent,Diluent
RTU Product Type
Single Ingredient
Yes
Technologies
Product Families

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Features and Benefits
  • Single component
  • High compressive strength
  • High performs at temperatures at 350 °F (177 °C)
  • Flame resistant
  • No SVHC ingredients

Applications & Uses

Properties

Physical Form
Notes
  • * Cure temperature refers to temperature of material as determined by thermocouple. Slow heat-rise of 3 – 7 °F is preferred to reduce shrinkage and minimize outgassing during cure.

Regulatory & Compliance

Technical Details & Test Data

Technical Information
  • Extrusion rate varies with thawing method and length of time after thaw.
  • Adjust thawing technique to suit the application.
  • Allow thawing at room temperature, or cartridges may be thawed in a microwave oven at low power setting, or thaw 15 - 30 minutes in a 180°F (82°C) water bath.
  • This will bring material temperature to 120 - 125°F (49 - 51°C).
  • Apply with a Semco® air-operated sealant gun without nozzle.

Packaging & Availability

Regional Availability
  • Americas

Storage & Handling

Storage Information
  • EPOCAST® 938-A3 syntactic should be stored in a dry place in the original sealed containers at a temperature of -18°C (0°F) or lower.
  • Under these storage conditions, and when supplied under Huntsman standard certification, the product has a shelf life of over 6 months (from date of manufacture).
  • The product should not be exposed to direct sunlight.

Other

Appearance
Pale yellow
Color (SDS)
Red brown
Insoluble in (SDS)
Water
Odor (SDS)
Odorless
Mechanical Properties
ValueUnitsTest Method / Conditions
Compressive Strength18.0 kpsikpsiASTM D695 at 177°C, Ultimate
Compressive Strength31.0 kpsikpsiASTM D695 at 25°C
Hardness88.0 Shore DShore DASTM D2240
Physical Properties
ValueUnitsTest Method / Conditions
Densitymax. 1.4 g/cm³g/cm³ASTM D1622 at 25°C
Glass Transition Temperature (Tg)195.0 °C°CASTM E1363 onset by TMA expansion probe