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Would be curious to see if anyone out there that has used pressure treated lumber in their boat mods had has any issues with fastener failures or had holes eaten in their boats by the less-corrosive MCA? That's the great thing about forums like this.....full of opinions, backed up with...

Screwball is correct about the "C" = Copper. However he is wrong about it not being approved for aluminum contact. See the attached link. OSMOSE makes MCA which IS APPROVED for direct contact with aluminum. Copper and Aluminum arent friends. However, Screwball, the FACT in the matter...

The MCA treatment is approved for direct contact with aluminum. I would rather not mention which store(s) stock the ACQ or AC2 products. These products are effective against rot, decay and termite infestation, which is what all pressure treated lumber is ultimately designed to do. Just ask...

New to the forum, but have seen numerous posts regarding the use of pressure treated lumber, and its potential corrosive qualities. I am in the pressure treating industry, and want to educate those folks who may not be clear on this topic. About 4 years ago, a new treating chemical was...