NAFDAC 15 Marine Coating, General Description

NAFDAC™ is a strong rubbery version of our Fluorinated Polyurethane (FPU™) that provides a nontoxic anti-fouling coating that works in two ways to protect boat and ship hulls from fouling by marine organisms.

Traditional Anti-fouling paints are toxic. They inhibit fouling by poisoning the marine organisms that colonize a ship's hull. Unfortunately, toxins build up in the water destroying valuable forms of marine life, especially in inland waterways and harbor areas, with heavy traffic and low rates of water exchange. The Marine Environmental Protection Committee (MEPC) of the United Nations (UN), International Maritime Organization (IMO), passed a resolution to stop using tin-based toxic paints by January 1, 2003 and to mandate their removal by January 1, 2008. As a result, using a traditional anti-fouling paint today not only creates potential legal problems, but also exposes the owner to future costs for the removal and safe disposal of the toxic coating.

NAFDAC™ is the culmination of over 20 years of research and development by the U.S. Naval Research Laboratory, which has pending patent on the formula. It provides an effective non-toxic alternative to anti-fouling paints. Instead of poisoning marine organisms, dual-action NAFDAC™ works in two ways to inhibit the organism's ability to attach themselves to the surface.

At the same time, the FPU™ coating is so non-reactive that it is nonpolluting and is actually suitable for potable water applications.

NAFDAC™ is a high-build, high-performance, two-component, chemically cured aromatic urethane elastomeric coating. It can be applied like conventional paint. It cures by a polymeric reaction to a tough, stretchy, abrasion-resistant, and impact resistant film. NAFDAC™ is intended for use in full immersion service as a nontoxic antifouling coating where long life and compliance with environmental restrictions are required.


Vehicle Type Fluorinated Aromatic Polyurethane Elastomer
Solids Content ± 2% 95% by volume.
Coverage (Theoretical) 65 square feet per kit at 20 mils DTF.
Coverage (Estimated) 45.5 square feet per kit at 20 mils (30% Loss Factor).
Number of Coats One (at 20 mils DFT) Recoating is not recommended. Apply needed film build at one time in as many passes as necessary.
Application Method Spray (Plural component recommended at elevated temperature).
Thinner Not recommended.
Clean up solvent Polyurethane grade thinner.
Shelf Life at 75° F 6 months from date of manufacture.
7 days full cure
Induction Time None
Density 8.96 pounds per gallon (mixed).
Temperature Resistance 140 �F (60�C) dry.
Specific Gravity �3% 1.08 (mixed).
Flash Point (Seta Flash) Under 60�F
Color, Gloss Transparent straw color. High Gloss.
Pot Life 3 hours at 70° F (21° C)
Mixing Ratio 72 parts curing agent to 28 parts base (by volume or weight).
VOC Content 0.35 pounds per gallon (42 grams/Liter).
Shipping Information Two components:Base (0.95 Qt) in 1-Qt can.Curing Agent (2.5 Qt) in 1-Gal can.
Freight Proper Shipping Name: Paint.Hazard
Class: 3, Hazard Subclass: NA.
UN/NA Number: 1263.
Packing Group: III.

IconSurface Preparation

All surfaces must be free of oil, grease, chlorides, salt and moisture before abrasive blasting to near white metal equivalent to Steel Structures Painting Council SP-10, NACE 2, or Swedish Standard Sa 2 1/2. The minimum steel profile after blasting should be 2 mils (50 micrometers) in depth and be of a jagged nature as opposed to a peen pattern. Compressed air used to clean dust from blasted surfaces must be free of oil and water.

Surfaces must be free of moisture, grit and dust before priming. The primer must be applied to the blasted surface as soon as possible to prevent rerusting or contamination. Apply an anticorrosive epoxy primer according to the manufacturer's instructions and allow it to cure for 16 to 24 hours. The cured primer must be free of amine blush and unreacted materials.

Existing anticorrosive primers must be free from salt, chlorides, oil, grease and moisture, and are preferably cleaned by high-pressure water washing. Application over coal tar or epoxy primers also requires a light grit sweep.

NAFDAC™ should be applied to the primed surface as soon as possible to prevent contamination of the primer.


NAFDAC™ is a 2-component product. The base component (0.95 quart) is supplied in a 1-quart can, and the curing agent (2.5 quarts) is supplied in a 1-gallon can. The base component and the curing agent must be mixed separately, slowly and thoroughly before combining.

The entire contents of the quart can are to be added to the gallon can; there will be room in the gallon can to complete mixing. Continue to mix slowly until the system is homogeneous. Take care not to incorporate excess air into the coating.

Thinning is not normally required. However, up to 5% of a moisture-free polyurethane-grade thinner may be added to enhance application.

Icon Application

NAFDAC™ may be applied over most aged alkyd, epoxy, and zinc-rich coatings which are in good condition, tightly adherent, and suitable for overcoating. Before application of a previously-coated surface is undertaken, a small area should be coated and then inspected for lifting, wrinkling, or softening of the underfilm. NAFDAC™ must not be overcoated.

Optimum application properties and working life of the coating are obtained when the mixed components are at 68 �F (20 �C). At temperatures above 77 �F (25 �C) potlife will be dramatically shortened and plural component equipment should be considered. At extremes of temperature, efforts should be made to keep the mixed components at 68 �F (20 �C). The temperature of the surface must be at least 50 �F (10 �C), and must be at least 5 �F (3 �C) above the dew point.

For airless spray application, use a 45-to-1 or larger pump and a .023" to .029" tip size. Adjust fluid and air pressure to provide a good spray pattern. The mixing ratio must be checked volumetrically during use of plural component equipment. DO NOT allow the coating to remain in the application equipment longer than 45 minutes. Flush out all application equipment whenever there is a delay in application.

For air-assisted spray application, a .070" to .086" tip size (DeVilbiss E and D tips) and an air cap with good breakup (DeVilbiss 704 or 765) should give good results. Ideally, the coating should be in a cup below the spray gun and the aspirator tube should be less than 10" (25 cm) long. The fluid pressure should be kept low, about 15 psi, with just enough air pressure to get good break-up of the coating. Excessive air pressure will entrain too much air into the coating film.

The coating must be allowed to cure for 7 days at 68 �F (20 �C) or higher before being immersed. Longer curing times are required if temperatures are lower than 68 �F.

Although NAFDAC™ is low in VOC, good ventilation with dry air is required for the protection of the applicator and proper curing of the coating. Ventilation should be maintained throughout the entire cure period. Solvent vapors are heavier than air; be sure that the air in the lowest working areas is constantly replaced with fresh, dry air.


This product is intended for industrial use only and is not intended or suitable for use in or around a household or dwelling. It contains no monomeric isocyanate, but may nevertheless cause respiratory distress in some people. Provide ample ventilation. Wear a fresh air respirator when using this product in confined areas or when spraying. Wear rubber gloves, safety goggles and protective clothing. Read the material safety data sheet thoroughly before use for complete safety and precaution requirements. The cured dry coating is completely inert.


This product must be stored in accordance with national regulations. Preferred storage conditions are in upright tightly-sealed containers in a dry space with adequate ventilation and free from flames, heat and sparks.


NAFDAC™ is an experimental product in the early stages of testing. 21ST Century Coatings, Inc. warrants this material to be free from defects in materials and workmanship.

21ST Century makes no other warranties concerning NAFDAC™ . No other warranties, whether expressed, implied, or statutory, such as warranties of merchantability or fitness for a particular purpose, shall apply. In no event shall 21ST Century be liable for consequential or incidental damages.

Any recommendations or suggestion relating to the use of this product made by 21ST Century, whether in its technical literature or in response to a specific inquiry, or otherwise, is based on data believed to be reliable. However, the product and information are intended for use by persons or organizations having requisite skill and know-how in the industry, and therefore the user must satisfy itself before use of the suitability of the product for its own particular application and it shall be deemed that the user has done so, at its sole discretion and risk. Variation in environment, changes in procedures of use, or extrapolation of data may cause unsatisfactory results is an experimental product in the early stages of testing. 21ST Century Coatings, Inc. warrants this material to be free from defects in materials and workmanship. Variation in environment, changes in procedures of use, or extrapolation of data may cause unsatisfactory results.

Limitation of Liability

21ST Century's liability on any claim of any kind, including claims based upon 21ST Century's negligence or strict liability, for any loss of damage arising out of, connected with, or resulting from the use of the product shall in no case exceed the price paid to 21ST Century for the product alleged to be responsible for the claim. In no event shall 21ST Century be liable for consequential or incidental damages.


The technical data contained herein are true and accurate to the best of our knowledge. All products are offer and sold subject to 21st Century Coatings, Inc. Standard Conditions of Sale. Published technical data and instructions are subject to change without prior notice.


Additional Information

For additional information contact your Distributor or :
21st Century Coatings, Inc.
4701 Willard Ave., #426
Chevy Chase, MD 20815
Tel: (301) 654-0099 Cell: (301) 873-5230