TYPE: Single pack, premixed, ready-to-apply, liquid organic zinc compound
GENERAL PROPERTIES: ZRC-221 is a advanced-technology cold galvanizing compound based on a trade secret organic binder which affords true galvanic anti-corrosion protection to metals. The dried film of ZRC-221 is 92% metallic zinc. Because of the uniqueness of the formulation, ZRC is the only coating of its type to be recognized under the Component Program of Underwriter's Laboratories, Inc.
RECOMMENDED USES: ZRC-221may be used without topcoat in place of hot-dip galvanizing. Also used as a high-performance base coat with a variety of topcoats. Used for repair of damaged hot-dip galvanizing, Galvalume® and zinc metallizing, regalvanizing worn hot-dip galvanizing, repair of weldments, and repair of damaged inorganic zinc coatings. Excellent for long-term protection of structural steel, water and waste facilities, power plants, transmission towers and antennae, steel decking and bridges, and numerous OEM uses
SUBSTRATES: Apply to properly prepared carbon steel, cast iron, hot-dip galvanized and aluminum surfaces.
NOT RECOMMENDED FOR: Contact with potable water, strong acids or strong alkalis
TEMPERATURE RESISTANCE (non-immersion):
Continuous: 350°F max/177°C max
Non-Continuous: 750°F max/399°C max
SALT FOG EXPOSURE: 2,000 Hours (ASTM B117)
VOC: 1.8 lbs/gal (221 gms/ltr) (ASTM D3960)
Architectural Specifications:
Suggested Specification Verbiage
CSI Format Specification
Outline Specification
SOLIDS CONTENT: % Solids of Liquid Coating — 85% (by weight)/56% (by volume)
METALLIC ZINC CONTENT: 92% by weight in dry film. Zinc Dust used specified as ASTM D 520 Type III.
RECOMMENDED FILM THICKNESS PER COAT:
Wet: 3.0 mils (76 µ) Dry: 1.5 mils (38 µ)
THEORETICAL COVERAGE:
400 ft²/gal @ 1.5 mil dry film thickness
3.4 m²/kg @ 38 µ dry film thickness
MINIMUM SHELF LIFE:
Liquid — 3 Years
FINISH: Flat light gray
FLASH POINT: 109°F (SETA method, ASTM D3278)
WEIGHT PER GALLON: 26.2 lbs (ASTM D1475)
MASS DENSITY: 3.15 gms/cm
VISCOSITY: 1100 cps. Brookfield RVT spindle #5 @ 100 RPM, 25°C
PENCIL HARDNESS: 2H (ASTM D3363)
POT LIFE: At least 24 hours @ 77°F (25°C)
WATER IMMERSION: 100° F (38°C)
SURFACE PREPARATION: Dependent upon surface conditions and intended service. Typical examples are as follows:
| Grease & Oils |
Solvent to clean SSPC-SP1 |
| Rust Scale |
Power tool clean to SSPC-SP3 or SSPC-SP11 (SIS St 2 or 3) |
| Mill Scale, Paint or Heavy Rust |
Sandblast to SSPC-SP6 (commercial)
(SIS Sa 2) |
| Water Immersion |
(100°F (38°C) Maximum) Sandblast to SSPC-SP10(near white)
(SIS Sa 2.5) |
APPLICATION METHODS
BRUSH/ROLLER/AEROSOL: Apply as received in container.
SPRAY (low pressure compressor type):
| Atomized Air Pressure |
50 psi (1.3 kg/cm²) |
| Fluid Pressure |
15 to 20 psi (0.4-0.6 kg/cm²) |
| Orifice of Tip |
0.080 inches (0.20 cm) |
| Viscosity Reduction |
5:1 ZRC-221 : parachloro-trifluoromethyl-benzene (vol) |
SPRAY (airless type):
| Pump |
30:1 Ratio |
| Hose |
1/2" (1.3 cm)(I.D.) Airless Type |
| Orifice of Tip |
60° - .026 in. (0.07 cm) |
| Type of Tip |
Tungsten carbide, reversing |
| Filter Screens |
Complete removal is recommended. However, if screens are employed, use no less than 30 mesh. |
| Viscosity |
No reduction required. |
| Recommended Procedure |
Connect hose directly to pump ensuring a hose length of 50 ft. max. Use least procedure possible. Start at 1500 lbs. (680 kg) and increase as required for good spraying. |
CLEAN UP: ZRC XXX Thinner or Xylol/Xylene
DRY TIME (set to touch): When ambient air dried, 20-30 minutes @ 1.5 mil (38 µ) thickness
RECOAT TIME (2nd coat of ZRC-221): 12 hours. Under certain conditions, recoat time can be reduced. Please contact manufacturer for specifics.
TOPCOATING: After 24-48 hours, ZRC-221 may be topcoated with acrylic, chlorinated rubber, epoxy, urethane or vinyl type products. DO NOT TOPCOAT WITH ALKYD, ALKYD-MODIFIED ACRYLIC, OR LACQUER TYPE PRODUCTS.
PRICING: Prices may be obtained from your ZRC Distributor or ZRC Customer Service Representative at 1-800-831-3275 (domestic US only), 1-781-319-0400, by fax at 1-781-319-0404 or
Online Inquiry Form.
AVAILABILITY: ZRC-221, being a custom product, is only available direct from the factory.
APPROXIMATE SHIPPING WEIGHT:
| Size |
Weight/Unit |
Units/Case |
| gallon can |
27 lbs (12.2 kg) |
2 |
