3M™ Surface Pre-Treatment AC-131 is a high-performance, non-chromated, conversion coating for applications on aluminum, nickel, and titanium alloys. The 3M™ AC-131 Pre-Treatment application is used for parts subsequently finished with epoxy-based and polyurethane-based organic coatings.

3M™ AC-131 Pre-Treatment provides an excellent solvent-free alternative to achieve the high performance required in aircraft paint applications. The current surface preparation technique such as Alodine® provides acceptable surfaces for coating applications. However, the alodine® process produces significant amounts of hazardous waste.
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Item #

Item Name

Color

Induction Time

Pot Life after Mixing

Kit Designation

AC-131 BB N/A 3M™ AC-131 2-Part Blue Color Surface Pre-Treatment Conversion Coating N/A Blue N/A 30 min N/A 24 hour N/A 100 mL50 mLPint Quart 1 gal5 gal
AC-131 CB N/A 3M™ AC-131 2-Part Clear Color Surface Pre-Treatment Conversion Coating N/A Clear N/A 30 min N/A 24 hour N/A 100 mL50 mLPint Quart 1 gal5 gal
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