ZRC 24 Lbs Cold Galvanizing Repair Compound

ZRC Cold Galvanizing Repair Compound is a single-pack, premixed and ready-to-apply organic zinc coating designed for high-performance corrosion protection of metal surfaces. The dried film contains 95% metallic zinc, allowing the coating to provide true galvanic protection against corrosion.

Because of its high zinc content and specialized organic binder, ZRC provides a practical alternative for repairing damaged galvanizing and protecting exposed metal surfaces in demanding industrial environments.

Key Features of ZRC Cold Galvanizing Compound

Ready-to-apply single-pack liquid compound
Contains 95% metallic zinc in the dried film
Provides galvanic anti-corrosion protection
Repairs damaged hot-dip galvanized surfaces
Suitable for carbon steel and cast iron
Can be used on galvanized and aluminum surfaces
Suitable for weldment repair
Provides long-term corrosion protection
Can be used without a topcoat in suitable applications
Also works as a high-performance base coat
Suitable for industrial and OEM applications

ZRC Galvanizing Repair Applications

ZRC works particularly well for repairing damaged or worn zinc coatings. It can restore protection to areas affected by fabrication, welding, installation or mechanical damage.

Common applications include:

Repairing damaged hot-dip galvanizing
Regalvanizing worn galvanized surfaces
Repairing weldments
Repairing damaged inorganic zinc coatings
Repairing Galvalume® surfaces
Repairing zinc-metallized surfaces
Protecting structural steel
Protecting steel bridges and decking
Water and waste facility structures
Power plant equipment
Transmission towers
Antennae and communication structures
OEM metal components

Suitable Metal Substrates

Apply ZRC to properly prepared:

Carbon steel
Cast iron
Hot-dip galvanized steel
Aluminum

Proper surface preparation remains important because a clean and suitably prepared surface helps the zinc coating achieve reliable adhesion and corrosion protection.

High Zinc Corrosion Protection

The dried ZRC film contains approximately 95% metallic zinc. Consequently, the coating provides galvanic protection rather than simply acting as a physical barrier.

Moreover, the high metallic zinc content makes ZRC particularly useful for industrial steel structures that require durable corrosion protection.

Temperature Resistance

ZRC provides strong temperature resistance in non-immersion service:

Condition	Maximum Temperature
Continuous	350°F / 177°C
Non-continuous	750°F / 399°C

Therefore, ZRC can support applications where coated metal experiences elevated operating temperatures.

Performance Specifications

Property	Specification
Product	ZRC Cold Galvanizing Repair Compound
Package	24 Lbs
Type	Single-pack, premixed liquid
Application	Cold Galvanizing & Corrosion Protection
Dried Film Zinc	95% Metallic Zinc
Salt Fog Exposure	2,852 Hours – ASTM B117
Prohesion/QUV Exposure	2,000 Hours – ASTM D5894
VOC	3.3 lbs/gal (385 g/L) – ASTM D3960
Continuous Temperature	350°F / 177°C
Non-Continuous Temperature	750°F / 399°C

Industrial Uses

ZRC is suitable for professionals who need reliable corrosion protection for steel infrastructure and industrial equipment. For example, contractors can use it for galvanized repair work, while maintenance teams can apply it to damaged zinc coatings after welding or fabrication.

It also works well in structural steel, power generation, transmission and water-related infrastructure where long-term corrosion control is important.

Important Limitations

ZRC is not recommended for contact with potable water. In addition, avoid applications involving strong acids or strong alkalis.

Always follow the manufacturer’s technical documentation and recommended surface preparation, application and safety procedures before use.

Why Choose ZRC 24 Lbs?

ZRC combines a ready-to-use formulation with a high metallic zinc content to provide practical galvanic corrosion protection. Furthermore, its ability to repair damaged galvanizing makes it useful for maintenance, fabrication and industrial restoration projects.

ZRC 24 Lbs Cold Galvanizing Repair Compound is a professional solution for repairing galvanized surfaces and protecting properly prepared metal against long-term corrosion.

Application Video

Application

POT LIFE: At least 24 hours

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. For brush application, we recommend only 100% Natural Chinese Bristle brushes. For roller application, we recommend rollers with a 3/8” nap, made of mohair or lambs wool (sheepskin).

SPRAY (low pressure compressor type):

Atomized Air Pressure	50 Lbs (1.3 kg/cm²)
Fluid Pressure	15 to 20 Lbs (0.4-0.6 kg/cm²)
Orifice of Tip	0.080 inches (0.20 cm)
Viscosity Reduction	4:1 Mineral spirits -OR- 16:1 Xylene

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 pressure possible. Start at 1500 lbs. (680 kg) and increase as required for good spraying.

CLEAN UP: Mineral Spirits or 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): 12 hours.

TOPCOATING: After 24-48 hours, ZRC 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.