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Protect HVAC Condenser Coils from Salt Air Corrosion

Specifically designed for coastal areas, Coil Shield stops salt air corrosion in its tracks. Coil Sheild protects condenser coils from metal corrosion, Great for coastal areas, it will extend the life of your condenser coils and protect them from the intensely salty air that can ruin your system.

Solutions to prevent premature coil failure are varied. The most common technique is to coat the coils with some type of an epoxy or polymer coating. Most treatments require the coil being shipped to an outside location, where it is dipped or sprayed with a special coating. Treatment and shipment contribute substantially to the cost of the coil, and then when it is shipped to the user, the coil must be reinstalled, another expense.

In these cases, delays can add weeks to the unit being put into service.

Weatherproof Coil Shield (WCS) is an advanced technology developed by Controlled Release Technologies’ R&D laboratory. Independent studies in an accelerated weathering chamber (salt spray, UV light exposure, heat, industrial chemical exposure) indicated WCS treated coils to perform for 4,000 hours. Tests were stopped at that point. Anyone can easily apply WCS in a matter of minutes to coils, and save expensive coil replacement and energy consumption due to decreased efficiency of corroded coils.

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Weatherproof Coil Shield is engineered to stop the corrosive effects of coastal salt fog on condenser coils.

Conditions vary widely. Winds, tides, and proximity to the ocean are all factors that determine corrosive rates. To help obtain a standard, accelerated weathering chambers are used to determine corrosion rates. In the field, it is recommended that Coil Shield be replaced every year under severe conditions, and less often under milder conditions.

The general idea is to subject the specimen to salt fog for extended periods in a controlled environment. In the case of Coil Shield, treated coils were exposed to salt fog, then UV light accompanied by high temperatures, and an industrial atmosphere containing sulfur dioxide. Coil Shield was exposed for 1,500 hours with no corrosive damage to coil fins. The test was then continued until fins on untreated coils were falling off copper tubing. Coil Shield specimens were structurally intact at the end of this 4,000 hour test period.

Look at your salt-spray life data from your coating supplier. Chances are WCS meets or exceeds their testing times.

WCS can be applied right at your location, with no special equipment or training, for $20 to $100 per condenser coil depending on size.

To adequately prepare and apply either of these products, you’ll be looking at 3 or more hours per coil of manpower. With WCS, you will be looking at 10 to 15 minutes max. per coil.

Measurements show no heat transfer reduction with WCS.


Coil Shield is sold in gallon containers. A 50-ton condenser unit will take about one gallon, while 1/2 pint is suitable for smaller units. Contact our customer service department to determine what you need for your units.

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