Epoxy Adhesives

DP190 Translucent and Grey

Surface Preparation

For high 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 necessary directly depends on the required bond strength and the

environmental aging resistance desired by the user.

The following cleaning methods are suggested for common surfaces:

Steel:

1. Wipe free of dust with oil-free solvent such as acetone, isopropyl or alcohol

solvents.*

Sandblast or abrade using clean fine grit abrasives.

Wipe again with solvent to remove loose particles.

If a primer is used, it should be applied within 4 hours after surface preparation.

2.

3.

4.

Aluminum:

1. Alkaline Degrease: Oakite 164 solution (9-11 oz./gallon water) at 87°C (190°F) ±

-12°C (10°F) for 10-20 minutes. Rinse immediately in large quantities of cold

running water.*

Acid Etch: Place panels in the following solution for 10 minutes at 65°C (150°F)

± 5°F.*

2.

Sodium Dichromate

Sulfuric Acid, 66°Be

2024-T3 aluminum (dissolved)

Tap water as needed to balance

4.1 - 4.9 oz./gallon

38.5 - 41.5 oz./gallon

0.2 oz./gallon minimum

3.

4.

5.

Rinse: Rinse panels in clear running tap water.

Dry: Air dry 15 minutes; force dry 10 minutes at 65°C (150°F) ± -12°C (10°F).

If primer is to be used, it should be applied within 4 hours after surface preparation.

Plastics/Rubber:

1.

2.

3.

Wipe with isopropyl alcohol.*

Abrade using fine grit abrasives.

Wipe with isopropyl alcohol.*

Glass:

1. Solvent wipe surface using acetone or MEK.*

2. Apply a thin coating (0.0001 in. or less) of 3M™ Scotch-Weld™ Metal Primer

EC3901 or equivalent to the glass surfaces to be bonded and allow the primer to

dry before bonding.

*Note: When using solvents, extinguish all ignition sources, including pilot lights, and

follow manufacturer’s precautions and directions for use.

Application Equipment

Suggestions

For smaller or intermittent applications, the 3M™ EPX Applicator is a convenient

method of application.

For larger applications these products may be applied by use of flow equipment.

Two part meter/mixing/proportioning/dispensing equipment is available for

intermittent or production line use. These systems may be desirable because of their

variable shot size and flow rate characteristics and are adaptable to manyapplications.

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