Self-Leveling and DP600NS

10

The following surface preparations were used for substrates described in this

Technical Data Sheet.

Optimized FPL Etch - 3M (test method C-2803)

1. Alkaline degrease – Oakite 164 solution (9-11 oz./gallon water) at 190°F ±

10°F (88°C ± 5°C) for 10-20 minutes. Rinse immediately in large quantities of

cold running water (3M test method C-2802).

2. Optimized FPL Etch Solution (1 liter):

Material

Amount

Distilled Water

700 ml plus balance of liter (see below)

Sodium Dichromate

28 to 67.3 grams

Sulfuric Acid

287.9 to 310.0 grams

Aluminum Chips

1.5 grams/liter of mixed solution

To prepare 1 liter of this solution, dissolve sodium dichromate in 700 ml of

distilled water. Add sulfuric acid and mix well. Add additional distilled water to

fill to 1 liter. Heat mixed solution to 66 to 71°C (150 to 160°F). Dissolve 1.5

grams of 2024 bare aluminum chips per liter of mixed solution. Gentle

agitation will help aluminum dissolve in about 24 hours.

To FPL etch panels, place them in the above solution at 150 to 160°F (66 to

71°C) for 12 to 15 minutes.

Note: Review and follow precautionary information provided by chemical

suppliers prior to preparation of this etch solution.

Rinse immediately in large quantities of clear running tap water.

Dry – air dry approximately 15 minutes followed by force dry at 140°F (60°C)

maximum for 10 minutes (minimum).

3. Both surface structure and chemistry play a significant role in determining the

strength and permanence of bonded structures. It is therefore advisable to

bond or prime freshly primed clean surfaces as soon as possible after surface

preparation in order to avoid contamination and/or mechanical damage.

Please contact your 3M sales representative for primer recommendations.

Oakite 164 solutions (9-11 oz./gallon of water) at 190°F ± 10°F (88°C ± 5°C) for

2 minutes. Rinse immediately in large quantities of cold running water.

Wipe surface with a methyl ethyl ketone (MEK) soaked swab, abrade and

wipe with a MEK soaked swab.* Allow solvent to evaporate before applying

adhesive.

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

and follow the manufacturer’s precautions and directions for use.

Surface

Preparation

(Continued)

Surface

Preparation