Chevrolet coolant condensor can

[Grant Bowker]

I've wondered whether the various gas tank sealing products might work for sealing and rustproofing the interior of the condenser cans. I hadn't really looked in past to see how they perform in warm/hot conditions (shouldn't have to worry about much over the boiling point of your coolant).
One review on POR15's web site says they used it with success on a coolant recovery tank.
KBS coatings say their tank sealer is good for up to 500 degrees (assume Fahrenheit). Thy also give test results for chemical exposures.

At least the CMP coolant recovery tanks aren't under either positive or negative pressure...