FRC General Description

This Modified Fluoropolyurethane is a two component solvent based topcoat. It combines the advanced technology of Fluoropolyol Resin, PTFE, Fluoroalkylsilane and Dimethyl Siloxane into a thin film coating system applicable to a variation of properly prepared substrates. This modified combination of materials, when cured, forms an extremely low surface energy film that creates a difficult surface for marine biological growth to adhere to. The finished cured system displays exceptional moisture and abrasion resistance while providing corrosion protection with outstanding appearance.

21FRC Modified Fluoropolyurethane is not a sacrificial coating; expels no toxic chemicals into the surrounding water. It exhibits excellent weathering characteristics and color retention with exceptional UV resistance, which will provide extended service life in Marine applications.


Vehicle Type Modified Fluorinated Polyurethane
Performance Corrosion Resistance: ASTM B117 Salt Fog 4,775 hrs, no deterioration, undercutting or pin holing
Acid Corrosion Resistance: ASTM B287-62 Acidulated Salt Fog Passed 1,500 hours, no deterioration.
Chemical Resistance: DIN 50018 Kesternich Cabinet Passed 1,000 hours, no deterioration.
Impact Resistance: ASTM D2794 Passed, no cracks or loss of substrate adhesion.
Resistance UV Radiation: ASTM G53 QUV Test Passed, 2,000 hours with over 90% gloss retention.
Resistance Sewage Attack: US Navy Sewage Immersion Test Passed, no deterioration.
Resistance Weathering: Weather-O-Meter Tests Currently 17 years with no deterioration.
Resistance Hot Condensate: US Navy DTNSMDC/SME-85/23 Passed, Hot water immersion.
Resistance to Petroleum Product Exposure: Passed,NRL Fuel Storage lining test passed.
Non Contaminating: AS4020 1994 Potable Water Passed, Certified for use with potable water.
Military Approvals: Passed and Exceeded all US Navy Industrial Coating Specifications
Naval Air Systems Command: MIL-C-81773A/AS All Tests Passed
NRL & Naval Ships Development Center: Retention of protective qualities in maritime conditions passed and exceeded requirements.
Surface Tension: 18 dyne/cm
Coefficient of Friction: (0.1-0.19) Static and (0.04-0.08) Kinetic
Solids Content ± 2% 77.5% by weight, mixed - White
Coverage (Theoretical) 420 sq ft per gallon 2.5 mils DFT - unthinned (including no loss factor)
10.30 sq m / liter at 63 microns DTF - unthinned (including no loss factor)
Coverage (Estimated) 315 sq ft per gallon at 2.0 mil DFT - (including 25% loss factor)
7.73 sq m / liter at 63 microns DTF - unthinned (including 25% loss factor)
Number of Coats One normally (2.0 mils to 3.0 mils DFT / 50-75 microns DTF)
Application Method Airless Spray preferred. Conventional spray acceptable, brush for small areas if necessary.
Thinner FUT-102 (Normal) or FUT-130 (Slow)
Clean up solvent MAK, MIAK or MIBK
Shelf Life at 75° F Fluoropolyurethane has a minimum shelf life of the Component A (Base) of 12 months from the date of manufacture and of the Component B (activator) of 6 months from date of manufacture if stored as indicated above, unopened in sealed containers. Ensure both components are consistent in appearance and thickness after stirring, and ensure that the activator (Part B) is clear and transparent before mixing the components together.
(Drying time at 70°- F 21° C)
1 hour to 4 hours tack free
18 hours hard
48 full cure
Temperature Limits 300°F Intermittent Dry Heat
Flash Point (Seta Flash) 93° F 34° C
Color, Gloss White - Low Gloss. (Other colors available upon request)
Pot Life 1.5 hours to 2 hours at 70° F (21° C)
1 hour at 90° F (32° C) Times may vary.
Mixing Ratio 2 to 1 by volume (2 parts base / 1 part activator)
VOC Content (Calculated) 2.46 pounds per gallon (295 grams per liter, mixed, White;
Shipping Information Approximately 12 pounds per gallon (5.44 kg) including container - White
Freight PAINT, FLAMMABLE LIQUID, UN1263 Hazard Class III, Packing Group III, Hazchem 3YE

IconSurface Preparation

Good surface preparation and cleaning of the substrate is essential to the performance of the coating system. All the surfaces that are to be coated should be dry, clean, and free of all contaminants.


Abrasive blast for this coating system. The relative humidity must remain below 85%. Apply coatings only when the steel surface temperature is more than 5° F above the dew point temperature of the surrounding air. This 5° F differential is necessary to prevent condensation of moisture on the surface. Apply this coating system only when the temperature of the ambient air and the receiving surface is between 50° F and 90° F. For optimum application properties, the temperature of the stored material should be between 50° F and 80° F prior to mixing and application. Maintain the unmixed material in closed containers in protected storage at 40° F to 95°F and out of direct sunlight or rain.

Ferrous Metal

Abrasive blast steel to SSPC-SP 6 to SSPC-SP 10 "Commercial Blast" to "Near White Metal Blast" with a surface profile of 1.5 to 2 mils (25 to 50 microns). On old or previously finished surfaces the degree of cleaning required prior to blast cleaning is dependent upon the condition of the substrate. Remove oil and prime with Pretreatment (Wash) Primer such as DOD-P-15328D, F-117 or equivalent.

Brush apply one coat of primer (Epoxy Polyamide Primer 21EP150 or equivalent) over welds, corners and crevices.

Apply full coat of primer (21EP150) over entire area to 3.0 mils DFT upon completion of the brushed areas. Apply primer to all areas as soon as possible after blasting but not longer than eight hours. Check dry film thickness. All areas must have a minimum coating of 3.0 mils DFT of primer. Areas with less than 3.0 mils DFT of primer should have an additional coat of primer or intermediate applied. Some specifications will require two (2) coats of primer / intermediate at 2 to 4 mils DFT each to assure proper coverage, with a total DFT of primer / intermediate to be 4 to 8 mils.

Apply the FRC Fluorinated Polyurethane at 2.0 to 3.0 mils DFT to obtain a total Dry Film Thickness of the coating system of 5.0 to 8.0 mils.

Galvanized Metal

Remove oil and prime with Pretreatment (Wash) Primer such as DOD-P-15328D, F-117 or equivalent.


Clean thoroughly and etch with phosphoric acid based cleaning solution. Rinse well and allow to dry. Prime with 21EP150 or equivalent.


Must be clean, dry, properly cured and free from all surface contaminants. "Brush off Blast" (SSPC-SP 7) to provide an etched surface and to remove contaminants and laitance. Remove all dust before coating.

Prime with an Acrylic Block Filler, if surface is extremely porous, or with an Acrylic Primer, if relatively smooth. Allow to dry at least 48 hours.

Follow primer with an intermediate coat of Epoxy Polyamide 21EP151 or equivalent prior to finish.


Must be clean, dry, properly cured and free from all surface contaminants. Hand or mechanically sand entire surface until smooth and to remove any gloss.

Solvent wipe surface with MAK, MIBK, MEK or Acetone, turning rag continuously to remove all sanding dust. Repeat if necessary to assure a clean dry surface.

Apply 1 or 2 coats of Epoxy Polyamide primer or intermediate (21EP150 or 21EP151) or equivalent prior to finish.


This is a two component coating supplied in two separate containers: Component A (base) and Component B (activator). Thoroughly mix Component A (base) with mechanical agitation material prior to mixing. Lightly shake Component B (activator) prior to mixing. Pour contents of Component B into Component A while under light agitation and stir well for approximately 3 to 5 minutes prior to application. No induction time is required, just thorough mixing of the materials. The paint should be kept covered at all times after mixing and during application to prevent contamination. Note that this material is moisture sensitive. Any introduction of moisture or water into the material during mixing or application will shorten usable pot life drastically.


This product, when mixed, should be ready to apply. In the field, it should require minimal thinning for application. If thinning is necessary to achieve the desired application viscosity, thin up to approximately 10 percent, maximum, per gallon. Use only the thinners indicated above in the Specification section.

Icon Application

21FRC Fluoropolyurethane is normally a one coat finish designed to be applied to a minimum 2.5 mils DFT (63 microns) over properly prepared and/or primed surfaces. 21FRC Fluoropolyurethane is designed for spray application but small areas may be brushed. Use of an airless spray unit, conventional spray or HVLP spray is recommended and preferred.


This material is for industrial use only. Material Safety Data Sheets will be furnished on all purchases, it is the responsibility of the applicator to be aware of the information contained therein.

Harmful Or Fatal If Swallowed. Harmful And/Or Irritating If Material Or Vapors Are Absorbed Through Skin. Keep Away From Heat, Open Flame And Sparks.

Use necessary safety equipment such as air masks, non-sparking tools, ladders, and shoes, explosion proof electrical equipment meeting the National Electric Standards, etc. See MSDS for detailed information. Notice: 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