COPPER COAT APPLICATION TIPS
The manufacturer’s instructions are very specific—and more complicated than rolling on paint. A few summary tips can help ensure success:
Become intimate with the instructions long before the application begins in order to avoid surprises.
Understand the impact of temperature and humidity in choosing the location, season, and timing of your application. Coppercoat won’t cure properly in temperatures below 50 degrees within 24 hours of application, and temperature also affects the pot life of the resin. Humidity also affects outcome; it’s recommended the coating be applied when relative humidity is less than 65 percent.
Assign roles. We had one person mixing constantly, two people rolling on Coppercoat
(Totem is 47 feet long), and a fourth to monitor and fill in as needed.
Confirm consumables and be sure you have access to necessary supplies. For example, the isopropyl alcohol used as a thinner needs to be 90 percent or higher, which we sourced from the US because only 70 percent purity was available in Mexico.
Allow enough time. Our application was done mostly in a single day. But this had to fully cure before we could move the jack stands and keel blocks to coat those areas. Totem’s process took a week in total to apply coats and cure the entire bottom.
Coppercoat is sold in kits, making it less readily comparable to gallons of bottom paint. Both Coppercoat US and UK’S websites include a handy calculator that takes hull shape into account to estimate how many kits you’ll need. The number of kits depends on the hull area. We used 16 kits to reach the recommended minimum of four coats.
Follow the final light-sanding/burnishing instructions to the letter. If the copper is not correctly exposed from the cured epoxy resin, it won’t have antifouling properties.