Application Type Bond 1 Part or 2 Part 1 Part Material Form Liquid Substrate Aluminum, Metals, Nylon, Most plastics, Rubbers, Steel, Stainless Steel Manufacturer 3M Chemistry Ethyl Cure Method Moisture Gap Fill 0.004 (in) Cure Time (min) Fast, 1,440 Viscosity (cPs) Low, 20 to 45 Color Clear Chemical Resistance Oils, excellent Relative Solvent Resistance Chemical Resistance: solvents High Temperature Resistance (°C) 82 Low Temperature Resistance (°C) -51 Key Specifications International Organization for Standardization
Technical Data for 3M EC40
- Adhesive - Bond
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- Other - Close-fitting parts and smooth, even surfaces
- Other - Ethyl
- Other - Hand applied
- Moisture / Condensation Cure - Moisture
- Clear / Transparent - Clear
- International Organization for Standardization
Gap Fill 0.004 (in) Cure Time (min) Fast, 1,440 Test Method Viscosity (cPs) Low, 20 to 45 Test Method Fixture or Handling Strength Time (min) <0.25 Test Method
General Bond Strength (psi) High Shear Strength (psi) 2,000, 2,400, 1,700, 1,000, 800, 1,200, 400, 800, 100 Test Method Tensile Strength (psi) 2,900 Test Method
Chemical Resistance Oils, excellent Relative Solvent Resistance Chemical Resistance: solvents High Temperature Resistance (°C) 82 Test Method Low Temperature Resistance (°C) -51 Test Method
Specific Gravity 1.06 (g/ml) Test Method
Shelf Life Details Storage: For short term storage (<30 days), keep adhesive in a cool (60°F to 80°F [16°C to 27°C]), dry place out of direct sunlight. Keep containers tightly covered and free of moisture. Refrigeration (40°F [4°C]) gives optimum long term storage stability.;Rite-Lok™General Purpose Instant Adhesives can be expected to have a shelf life of one year from the date of shipment from 3M when stored under refrigerated conditions. Shelf Life Temperature (°F) 140 to 176 Shelf Life Type From the date of shipment Shelf Life (mon) 12
Best Practices for 3M EC40
For optimum strength structural bonds, paint, oxide films, oils, dust, mold release agents, and all other surface contaminants must be completely removed. However, the amount of surface preparation depends on the required bond strength and the environmental aging resistance desired by the user. Typical quick surface preparation would include wiping with a clean solvent (such as isopropyl alcohol), abrading the surface with a clean fine abrasive, and then wiping again with a clean solvent to remove loose particles.
Note: When using solvents, extinguish all ignition sources, including pilot lights, and follow the manufacturer’s precautions and directions for use.
Ensure that parts are clean, dry, and free from oil and grease.
A Rite-Lok™ Instant Adhesive Activator may be required if there are bonding gaps or porous substrate surfaces, if substrates are low surface energy plastics (e.g., polyethylene, polypropylene) or if substrates have acidic surfaces (e.g., paper, leather).
Bond speed is typically very fast so ensure that parts are properly aligned before dispensing.
Product is normally hand applied from the bottle. Apply sparingly to one surface and press parts firmly together until handling strength is achieved. As a general rule, as little cyanoacrylate as possible should be used. Over application will result in slower cure speed and lower bond strength.
Full bond strength will typically be achieved within a 24 hour cure time.
Low humidity or low temperature conditions will slow down the cure rate.
After curing, Rite-Lok™ General Purpose Instant Adhesive bonds are suitable for use up to about 180°F (82°C). At 180°F (82°C) the bonds will be approximately70% of the strength at room temperature and at 212°F (100°C) about 50% of full strength.
Cyanoacrylate bond resistance to most oils and solvents is excellent. Long term humidity, moisture, or water immersion may affect the strength of a cured cyanoacrylate bond depending on the substrates and the bond gap. Testing is recommended to evaluate the effect.
Comparable Materials for 3M EC40
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Cure Time Test Methods
|Cure Time||Test Method|
Fixture or Handling Strength Time Test Methods
|Fixture or Handling Strength Time||Fixture-Handling Strength Test Method|
|<0.25 min||Uncured, On EPDM. Time to handling is substrate dependent.|
Viscosity Test Methods
|20 to 45 cPs||Uncured, Cone-Plate viscosity, CP75 at 3000/s shear rate|
Tensile Strength Test Methods
|Tensile Strength||Test Method|
|2,900 psi||ISO 6922|
Shear Strength Test Methods
|Shear Strength||Type||Substrate||Test Method|
|2,000 psi||Overlap Shear Strength||Steel||Cured, ASTM D-1002, Grit blasted|
|2,400 psi||Overlap Shear Strength||Stainless Steel||Cured, ASTM D-1002, Grit blasted|
|1,700 psi||Overlap Shear Strength||Aluminum||Cured, ASTM D-1002, Grit blasted|
|1,000 psi||Overlap Shear Strength||ABS||Cured, ASTM D-1002, Substrate failure|
|800 psi||Overlap Shear Strength||Polycarbonate||Cured, ASTM D-1002, Substrate failure|
|1,200 psi||Overlap Shear Strength||PVC||Cured, ASTM D-1002, Substrate failure|
|400 psi||Overlap Shear Strength||Nylon||Cured, ASTM D-1002|
|800 psi||Overlap Shear Strength||Polypropylene||Cured, ASTM D-1002, Primed with AC77, Substrate failure|
|100 psi||Overlap Shear Strength||Silicone Elastomers||Cured, ASTM D-1002, Primed with AC79, Substrate failure|
High Temperature Resistance Test Methods
|High Temperature Resistance||Test Method|
Low Temperature Resistance Test Methods
|Low Temperature Resistance||Test Method|
Specific Gravity Test Methods
|Specific Gravity||Test Method|