corrosion resistance for "regular" Tapcon screws

[HouseBoy]

I'm detailing to fasten PT 2x4's to an existing masonry wall.
Tapcon screws would "work best" BUT... I can't see a clear answer on their website that says they can be used with PT. It says OK in "very corrosive" environments but I'd be more confident if they said PT lumber specifically.

Owner would prefer not to use SS screws but I don't know if that is critical or not.

Anybody have a definitive answer or know of another, similar masonry screw product that is OK with PT lumber (other than SS)?

Thx

 

[Jerehmy]

Tapcons are coated in Climaseal which is a thermoset polyester. Just regular steel underneath. It is recommended to use hot-dip galvanized, stainless, copper, or bronze with pressure treated fasteners.

I personally have no experience with tapcons in conjunction with PT wood. But i’d have to think if the resin can withstand being driven into concrete, it should not wear away due to driving it into wood. You would just need to make sure there is no chemical reaction between the preservative treatment and the resin. I recommend a phone call, I’m sure the manufacturer could clear this up quickly. They likely have heard this question before. Otherwise, just use stainless.