Henkel Armstrong A-40 Epoxy Resin

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Description for Henkel Armstrong A-40 Epoxy Resin

A high-viscosity, liquid adhesive system that features exceptional resistance to salt spray, anti-icing fluid, outdoor weathering, jet fuels, hydrocarbon fluids, hydraulic oil, and creep.

Note: This material has been discontinued. Please view the Comparable Materials tab or call us at (262) 293-7970 for additional help.

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Brand	Armstrong
Application Type	Bond
1 Part or 2 Part	2 Part
Material Form	Liquid
Substrate	Metal, Wood
Manufacturer	Henkel
Chemistry	Epoxy, Polyamide amide
Application Method	Metal spatula, Trowel
Cure Method	Part A/Part B
Cure Temperature (°C)	20 to 25 Room Temperature, 99
Cure Time (min)	10,080, 120
Chemical Resistance	Anti-icing fluid, Hydraulic oil, Hydrocarbon fuel, Jet fuel, Salt spray
Key Specifications	Mil-Spec (United States Military Standard): MMM-A-134: MIL-MMM-A-134, Type II

Best Practices for Henkel Armstrong A-40 Epoxy Resin

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Technical Data for Henkel Armstrong A-40 Epoxy Resin

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Overview

Application Type
- Adhesive - Bond
1 Part or 2 Part
- 1 Part or 2 Part - 2 Part
Material Form
- Liquid
Substrate
- Metal
- Wood
Chemistry
- Epoxy
- Other - Polyamide amide
Application Method
- Dispenser - Mechanical applicator, Wooden coffee-stirrer
- Spatula/Trowel - Metal spatula, Trowel
Cure Method
- 2-Part Cure - Part A/Part B
Key Specifications
- Mil-Spec (United States Military Standard): MMM-A-134: Type II - MIL-MMM-A-134, Type II
Brand
- Armstrong

Specifications

Cure Specs

Cure Temperature (°C)	20 to 25 Room Temperature, 99
Cure Time (min)	10,080, 120
Work / Pot Time (min)	180, 120 to 630, 45	Test Method
Mix Ratio	5:2 (by weight)

Material Resistance

Chemical Resistance	Anti-icing fluid, Hydraulic oil, Hydrocarbon fuel, Jet fuel, Salt spray
Environmental Resistance	Exceptional

Conductivity

Filler	Polyamide amide, Inert

Hardness

Shore D Hardness	77
Elongation (%)	2

Business Information

Shelf Life Details	Store below 25°C out of sunlight and in original unopened containers. Refer to packaging specific quote for shelf life information.
Shelf Life Temperature (°F)	<77

Best Practices for Henkel Armstrong A-40 Epoxy Resin

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1. Surface Preparation
  
  Surfaces to be bonded should be clean and dry. For critical applications, refer to our suggested surface preparation procedures — Bulletin No. 964
2. Application
  
  Property mixed material may be applied to the surfaces being bonded with a mechanical applicator or any clean tool such as a metal spatula, trowel, wooden coffeestirrer, or equivalent. The material should be spread thinly and evenly. Glue lines as thick as .101” will provide good strength but the general rule is—the thinner the better. The important thing is that the surfaces being bonded are thoroughly “welted out” with the resin system. Once applied, the joints being bonded should be assembled immediately
  
  under no circumstances would this open assembly times exceed 30 minutes. No pressure is required other than that necessary to hold to assembly in position until the resin cures. Then uncured material may be removed from mixing utensils etc. with solvent such as Methyl Ethyl ketone (MEK) and/ or Cellosolve or equivalent.
3. Mixing
  
  The mix ratio for A-40 is 5 parts of Part A to 2 parts of Part B by weight. The concentration of Part B may be varied = 10% of the recommended amount without seriously affecting the physical properties other than the working life. For best results, the temperature of the Part A and Part B should be between 70° to 90°F. before mixing. Lower and higher temperatures can be employed but the working life will be reduced as the temperature is increased and the working life will be extended as the temperature decreases. At lower temperatures, the material is quiet vouches and not as easy to mix.
  
  A-40 should not be thinned with solvent at any time. The Part A and the Part B must be thoroughly mixed before the system is ready for use.
4. Curing
  
  A-40 should be cured as follows: 7 days at room temperature or 2 hours at 210°F. Where military specification qualification is necessary the 2 hour cure at 210°F must be followed.
Comparable Materials for Henkel Armstrong A-40 Epoxy Resin

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Spec Engine^® Results
- EP1056LC(Resinlab)
  Two part urethane modified epoxy adhesive, good gap filling ability and prevent running and sagging during cure, very good resistance to water, acids and bases and most organic solvents.
- 1838 B/A Green(3M)
  Long worklife rigid epoxy • 8-12 hrs. handling strength • Meets MIL-A-23941A • Excellent environmental resistance
- Loctite E-04(Henkel)
  A two-part, toughened epoxy adhesive that cures at room temperature. Resistant to a wide range of chemical and environmental conditions. Has excellent impact resistance and outstanding electrical insulation properties.
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