Ranthane is a high-solids, flexible, two-part polyurethane that is FAA approved for use on Ceconite fabric. Other polyurethanes are not approved on the Ceconite STC. Although extremely flexible, Ranthane is also optimized for use on primed aluminum, steel, or composite surfaces. Ranthane is offered in 50 colors as presented on Randolph color card 2004. Ranthane has three separately packaged components that are mixed before application. All three components are required and cannot be substituted: Ranthane polyurethane paint, AU-CAT-2X1 Catalyst, and G-4200 Urethane Reducer.
Packaging: Gallons and quarts. Required components are as follows:
One gallon of mixed components (two gallons sprayable) will yield 300 square feet with one coat. See aircraft estimated quantities in Ceconite Procedure Manual 101.
Mix two parts Ranthane with one part AU-CAT-2X1 and stir. Allow to sit for 20 minutes induction time before use.
Six hours depending on temperature, humidity, and color, the sooner applied after the induction period, the better the durability.
Thin the catalyzed Ranthane three parts to one part G-4200 Urethane Thinner. This is a starting point; you may need more. Then test spray a small sample and check for orange peel as it dries. If you have orange peel, you can add more G-4200, up to three parts catalyzed paint to two parts G-4200.
WARNING: AS WITH ALL CATALYZED POLYURETHANES, A FRESH-AIR SUPPLIED SPRAY MASK IS MANDATORY. CHARCOAL MASKS WILL NOT PROTECT FROM POLYISOCYNATES IN THE SPRAY MIST!
Ranthane may be applied directly over fabric surfaces when the Rand-0-Fill silver butyrate has dried at least 36 hours. More drying time is better. The same time restriction applies when Ranthane is applied over primed metal or composites: 36 hours. Applying Ranthane directly over fresh sub-coats may result in bubbles in the Ranthane from trapped sub- coat solvents.
Before committing to spraying a whole component, spray a vertical test area. If orange peel results, add more Urethane Thinner; if the test area results in runs, spray less. Spray a mist coat; allow this coat to dry until tacky. Follow with a moderate coat, wet enough for coverage and color, but not heavy enough to run. Wait one hour and spray a third wet coat. You may need a fourth. If you wait more than seven days between coats, lightly scuff the surface with an ultra-fine scotchbrite pad. Wait at least a week before applying tape for trim colors.
30 to 45 minutes depending on temperature and humidity. Wait at least 24 hours before taping or turning components on sawhorses to avoid damaging the fresh paint. To speed up drying, use 1 ounce of D-7201 Accelerator per quart of catalyzed Ranthane.
Shelf Life: Four years unopened. Insure contents are fully mixed before use.