Paint Prep

Clean and Condition Aluminum Before You Paint

Bonderite Alumiprep 33 and Alodine 1201 are aviation industry staples for pre-paint aluminum preparation.  

Preparing aluminum surfaces for painting using Alumiprep and Alodine involves a detailed, step-by-step process to ensure optimal adhesion and corrosion resistance. Here’s a professional guide:

1. Surface Cleaning: Begin by thoroughly cleaning the aluminum surface to remove dirt, grease, and oil. Use a degreasing agent or detergent followed by rinsing with clean water to ensure the surface is free of contaminants.

2. Alumiprep Application: Mix Alumiprep according to the manufacturer’s instructions. Apply it evenly to the aluminum surface using a brush, sponge, or spray system. Allow the solution to etch the surface for the recommended time, typically 2-5 minutes. This step removes oxidation and creates a clean, etched profile for improved adhesion.

3. Rinsing: Rinse the treated surface thoroughly with clean water to remove any residual Alumiprep. Ensure no chemical residue remains, as it could interfere with subsequent steps.

4. Drying: Allow the surface to air dry or wipe it down with a clean, lint-free cloth to remove excess moisture before moving on to the next step.

5. Alodine Application: Prepare the Alodine solution per the manufacturer's guidelines. Apply it evenly to the aluminum surface using a brush, sponge, or spray. Allow the solution to sit for the prescribed time (usually 2-5 minutes) to form a chromate conversion coating that enhances corrosion resistance and paint adhesion.

6. Final Rinsing: Thoroughly rinse the surface with clean water to remove any unreacted Alodine.

7. Drying: Allow the surface to dry completely in a clean environment. Do not touch the prepared surface to avoid contamination.

The aluminum is now prepped for painting. Follow the painting process promptly to ensure the treated surface remains uncontaminated and maintains its paint-ready condition.