Alumlprep 33 is an acidic metal cleaner and conditioner expressly compounded for aluminium. Prepares aluminium and its alloys for painting or welding. Detailed Product Description: Alumiprep 33® is a non-flammable phosphoric acid-based cleaner, brightener. and pre-paint conditioner for aluminum. Alumiprep. CERTIFICATE OF CONFORMANCE INCLUDED Alumiprep 33® is a non- flammable phosphoric acid-based cleaner, brightener and pre-paint conditioner for.

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How are you alumbiprep disposing of your spent alumaprep and alodine? If the part is starting to turn dark, that’s too long. It is pretty much all I am doing.

I was thinking that there was some more technical reason that people were prepping the alclad. I ask them about preping and primeing when the metal has an alkalad surface. These suggestions are purely based on my own years of trial and lots of error.

Don’t leave the part in the alodine too long. Only time will tell who is right.

aluminprep Don’t leave the part in the alumiprep too long. Alclad is a top layer of pure aluminum applied to the for corrosion protection.


I understand the religious debates, but there doesnt seem to be many “just clean it and dump it in alclad for a few minutes” believers out there.

Listing: Alodine & Alumniprep

But the normally recomended cleaner is Alumiprep After you rinse off the alumiprep, don’t let the part dry off. The question, why scuff up or “prep” alclad before treating it with alodine.

Just follow the instructions for application. Keep the part wet between alumnipprep and alodine. Any one have experience in using this cleaner, or can they recommend another cleaner and surface prep soluiont. They said 2 reasons. I guess metal prep is a real sensitive area. Then they put a 2 part epoxy primer on.

Using Alumiprep 33 before Alodine –

You’re eating up metal at that point. No registered users and 1 guest. Nothing wrong with that as far as I know, but if you get it right, the part almost looks like it’s anodized.

This all depends upon your definition of “durable barrier” between substrate and environment. It will turn out fine. The alumiprep leaves the aluminum bare, and it will oxidize as soon as the air hits it.


Who is online Users browsing this forum: This is the stuff of primer wars. If you are doing small parts in a “bath”, remember that alodine does not last forever. Then you have the temper number, ie.

Alumiprep Metal Cleaner & Alodine Chrome Conversion Coating – Chief Aircraft Inc.

Therin lies the variable of what each builder considers the best, most durable barrier for their airplane and it’s intened useage. The reason I asked was to make sure my next statement or question wasnt based on incorrect data. You cannot get the Alodine to work on without first treating with the Alumaprep It will come out with a “chalky” tone too it.

The alodine is really needed where there is no corrosion protection. A few suggestions about it’s use: I think it comes down to your individual plans for your specific aircraft.