Is Radiator Fixable?

[DanVB1]

I just did a major replacement of the cooling system components - hoses, water pump, HCV, etc.
I put in the Prestone extended life coolant and all was well for about three weeks. I noticed a few days ago a wet spot on the driveway...it was coolant coming from the transmission cooler connections as they protrude from the plastic radiator tank. Apparently, there is a gasket or O-ring that doesn't like the new type of coolant and the seal is leaking very slightly.
Can these be repaired easily or do I need a new radiator?

 

[MAKG]

Maybe, IF it's just O-rings. If the tank itself is damaged, you won't fix it. It's not worth replacing tanks when whole brand new radiators cost in the low $100s.

And next time use the correct coolant. You can replace it with propylene glycol (also green stuff) if you're concerned about small animals and small children.

 

[DanVB1]

The tank looks OK. Checked it yesterday and the connections were dry. Regardless, I want to fix or replace while the weather is still cool here in Louisiana.
MAKG, you drive an Exploder? It must be pretty dangerous!