M-3225 Primer is catalyzed 1:1 with M-3226 phosphoric acid reducer, and thinned about 25 percent with U-1014. It should be applied in very thin film thickness (2 - 5 wet mils).
Use it as an aluminum and steel pretreatment primer where chemical conversion is impractical, for marine, aircraft, and transportation functions.
M-3225 is an aircraft standard, and because of its low surfacing hiding characteristics, is best overcoated with U-1201 or U-1000 primer prior to topcoating.
This primer is often used to coat interior aluminum surfaces on boats, where acid etching and Alodine application are impractical, and is often followed by the application of U-2554 or urethane topcoat.
It is important that this primer should not be applied in heavy coating thickness, or adhesion will be compromised. It should be applied in a one pass transparent film. It may not be satisfactorily brushed.
Note — ALL Sterling paint products and components are sold separately.
This is a two-part product - be sure to purchase both components; see Related Products, below.