Can I Paint or Coat the Copper Piping on My Furrion Air Conditioner to Prevent Salt Water Corrosion?

Updated 04/17/2026 | Published 04/11/2026

Question:

I live 3 blocks from the Pacific ocean and salt in the air caused the piping in my old unit to corrode and leak. Can the copper piping be painted or coated to prevent corrosion?

asked by: Andrew M

Expert Reply:

Hello Andrew,

Living that close to the ocean creates a very harsh environment for any exposed metal, and copper refrigerant lines are especially vulnerable. Salt carried in the air settles on the surface of the tubing and, combined with moisture, can lead to accelerated corrosion over time. This is often what causes the small pinhole leaks that show up in older systems, even though copper is normally considered corrosion resistant.

For your Furrion Chill HE RV Air Conditioner System - Manual - 13,500 Btu - White - R32 # FR95TD, the copper refrigerant lines can be coated to help slow down or prevent this type of damage. Applying a protective coating creates a barrier between the copper and the salt air, which is exactly what you need in a coastal environment. This is a common practice in HVAC installations near the ocean and can significantly extend the life of the system.

That said, the type of coating and the preparation are very important. Standard spray paint is not the best option because it may not adhere properly or could trap moisture against the copper. Instead, a coating designed for HVAC or marine environments is recommended. These are typically clear or thin-film coatings that bond well to metal and resist salt and moisture. Before applying anything, the copper should be clean and free of oxidation, dirt, or oil so the coating can properly adhere.

It is also a good idea to protect the lines physically in addition to coating them. Using insulated line covers or a sealed line set wrap helps keep salt air from directly contacting the copper in the first place. Pay special attention to joints and fittings, since those areas tend to corrode first.

I grew up in California, I miss the smell of the salt water in the air.

Any big upcoming trips you are looking most forward to? Where are you headed this time?