Epoxy Adhesives

DP-100 Clear • DP-100 NS Translucent

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Surface Preparation

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 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 or isopropyl alcohol.*

2. Sandblast or abrade using clean fine grit abrasives.

3. Wipe again with solvent to remove loose particles.

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

Aluminum:

1. Vapor Degrease: Perchlorethylene condensing vapors for 5-10 minutes.

2. Alkaline Degrease: Oakite 164 solution (9-11 oz./gallon water) at 88°C ± 5°C

(190°F ± 10°F) for 10-20 minutes. Rinse immediately in large quantities of cold

running water.

3. Acid Etch: Place panels in the following solution for 10 minutes at 66°C ± 2°C

(150°F ± 5°F).

Sodium Dichromate

4.1 - 4.9 oz./gallon

Sulfuric Acid, 66°Be

38.5 - 41.5 oz./gallon

2024-T3 aluminum (dissolved)

0.2 oz./gallon minimum

Tap Water as needed to balance

4. Rinse: Rinse panels in clear running tap water.

5. Dry: Air dry 15 minutes and force dry 10 minutes at 66°C ± 5°C (150°F ± 10°F).

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

Plastics/Rubber:

1. Wipe with isopropyl alcohol.*

2. Abrade using fine grit abrasives.

3. Wipe with isopropyl alcohol.*

*Note: When using solvents, extinguish all ignition sources and follow the

manufacturer’s precautions and directions for use.

Application Equipment

Suggestions

For small or intermittent applications the 3M™ Scotch-Weld™ EPX Applicator is a

convenient method of application.

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

Two-part meter/mixing/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 tomany applications.