I had to rebuild a ramp and communicate to tenants it it did not work and would need to be redone (by a pro this time)....Temporary solution at best in my opinion for any large surface..Break it up and replace the driveway and use a sealer (to protect from salts, and use the least corrosive ice melt).

In addition to the great advice from Ashley, remember that salt water is corrosive...expect more work than you expect...

This will keep your equipment in good shape, make it last longer, will uncover potential problems, and may potentially keep you from a costly night/week-end call-out.At minimum, this check should include about 20 or more items, checking the capacitor, amp draws of your fan, compressor, pressure check, air flow check, inspection of electrical components for corrosion/pitting, and many other things. 

According to google: "Corrosion of the copper tubing in thecoil from the outside in is the most common cause of evaporator coil leaks.

@Ola DantisLeaks are normally at the evaporators due to the condensation over the years and corrosion.

He noted there are corrosion and rust in the waste lines, so there might be some leaks there, but because utilities weren't turned on, we couldn't tell for certain.I completely agree with you that there are probably more mold than meets the eye.

They treat the water to prevent corrosion and therefore limits lead.

I check the electrical panel box for size and visual defects (corrosion, scorched wires).

The service rep did tell me that the thermostat was prob miscalibrated over the years due to corrosion and use.

This liner is used primarily to protect the steel pipe from very corrosive enviornments.