Caution: Saturn Corporation believes the following materials to be reliable. There may be additional manufacturers of such materials. Saturn Corporation does not endorse, indicate any preference for, or assume responsibility for the following materials from these firms or for any such materials which may be available from other sources.

Introduction

DP90 Epoxy Primer mixed in a 1:1 ratio with DP402 Catalyst, produces a corrosion-resistant epoxy primer.

Surface Preparation

1. If the bare metal area of repair which requires DP90/DP402 primer is larger than 25 mm (1 in) in diameter, size of a quarter, AMCHEM Bonderite 68 application must be done.
2. If small repair, not requiring AMCHEM Bonderite 68 or D840, wire brush and wipe the surface which has been welded or repaired, so as to remove any oxidation or loose particles before application of DP90/DP402 primer.

Application

Mix equal parts by volume of DP90 Epoxy Primer and DP402 Epoxy Primer Catalyst. Thoroughly mix both components before use. Apply 1-2 full wet coats, using a spray gun on all visible surfaces, or paint brush on covered or non-visible surfaces. Allow to air dry for 1 hour at 21-30°C (70-85°F), or force dry for 40 minutes at 61°C (140°F).

Caution: Saturn Corporation believes the following materials to be reliable. There may be additional manufacturers of such materials. Saturn Corporation does not endorse, indicate any preference for, or assume responsibility for the following materials from these firms or for any such materials which may be available from other sources.

Important: This procedure is not required if the bare metal surface is less than 25 mm (1 in), approximately the size of a quarter.

Process

1. Cleaning
2. Treating with AMCHEM Bonderite 68 or D840
3. Water rinsing
4. Drying

Equipment

AMCHEM Bonderite 68 or D840 may be applied with a paint brush or with a spray bottle.

Surface Preparation

All metal to be treated with AMCHEM Bonderite 68 or D840 must be free from grease, oil, rust, or other foreign matter. Also, welds must be vigorously wire brushed to remove oxidation caused by the welding process.

Application

AMCHEM Bonderite 68 or D840 is used as received. The metal surface is wet evenly to produce a uniform thin coating. Also, avoid applying too much of the solution.

Allow 2 1/2 minutes for AMCHEM Bonderite 68 or D840 to react with the metal. A definite darkening of the metal surface indicates formation of the coating. To insure the solution remains wet for 2 1/2 minutes, apply more solution as required.

AMCHEM Bonderite 68 must be rinsed off with water before it drys on the metal.

After Treatment

1. Water rinsing -- Immediately after above process is complete, and before AMCHEM Bonderite 68 or D840 drys, treated area must be rinsed off with clean water. The rinse is best accomplished by flushing out with a squeezable plastic bottle filled with water. Excessive rinse water should be allowed to drain off. Pockets or seams must be blown out with air.
2. Drying -- The metal treated with AMCHEM Bonderite 68 or D840 should be dried immediately. It may be air dried, but if it does not dry quickly, force drying with air or a heat gun should be done.
3. Storage --No special storage is required. Keep AMCHEM Bonderite 68 or D840 from freezing. If it becomes frozen, thaw out and stir before using.