Skip to main content

PatchGuard™ Galvanic Anodes

Designed to combat the "ring anode" effect, PatchGuards™ are drilled into the native concrete to provide cathodic protection to the vulnerable area surrounding new concrete patches.

The PatchGuard Difference

Corrosion of the reinforcing steel is the #1 cause of concrete damage, but it is often overlooked when making local patch repairs. PatchGuard™ galvanic anodes are designed to extend the life of patch repairs by providing corrosion protection to the steel in the most vulnerable area surrounding a new concrete patch. When electrically connected to the steel, PatchGuard™ forms a galvanic cell and preferentially corrodes/consumes, while offering corrosion protection to the steel reinforcement located outside of the new concrete patch.

Rather than the traditional approach of attaching galvanic anodes to exposed steel within the patch repair, PatchGuard™ anodes are located within the surrounding, sound concrete. Protective current is delivered directly to the steel outside the patch repair - which is at greatest corrosion risk. As PatchGuard™ is positioned within the host concrete; there is no compromise in the quality of the concrete repair material.

Application Usage for PatchGuard™ Galvanic Anodes

Residential Structures

Parking Structures

Elevated Swimming Pools


Targeted Corrosion Protection

70% of repairs deteriorate within 10 years. Why? The answer is simple. These repairs do not address the underlying problem: corrosion. As an owner, it can be frustrating to invest in repairs, only for the area surrounding the new repairs to show corrosion damage shortly afterwards. With PatchGuard™ this no longer needs to be the case. By incorporating PatchGuard™ into repair specifications, the service life of the repairs will increase significantly, saving owners time, money and disruption. 

PatchGuard™ is a cost-effective way to proactively address corrosion and extend the life of essential concrete repairs. PatchGuard™ galvanic anodes can provide effective corrosion protection for up to 20 years with no monitoring or operation required.

Manufactured in the UK by CPT:

  • Fit & Forget – no ongoing operation/maintenance cost
  • No compromise in quality of repair mortar
  • Up to 20 years of protection
  • Available in a range of sizes


PatchGuard™ 175 - Diameter¾"
PatchGuard™ 175 - Length1.5"
PatchGuard™ 175 - Zinc Weight65g
PatchGuard™ 350 - Diameter¾"
PatchGuard™ 350 - Length3"
PatchGuard™ 350 - Zinc Weight120g
PatchGuard™ 400 - Diameter¾"
PatchGuard™ 400 - Length3.75"
PatchGuard™ 400 - Zinc Weight160g
PatchGuard™ 500 - Diameter¾"
PatchGuard™ 500 - Length4.5"
PatchGuard™ 500 - Zinc Weight180g

Technical Documents

Learn more about how PatchGuard™ can help mitigate corrosion

Related Projects

Arcadian II Condominium

Residential Structures

Arcadian II Seawall Cathodic Protection

Arcadian II Condominium

Corrosion of reinforced concrete seawall

AMP-UP RB, PatchGuard Galvanic Anodes

Learn More
Learn More about Arcadian II Seawall Cathodic Protection
Aman Hotel, Miami Beach, FL


Aman Hotel, Miami Beach

Aman Hotel

Corrosion of concrete facade

AMP-UP RB, PatchGuard Galvanic Anodes

Learn More
Learn More about Aman Hotel, Miami Beach
Connemara Condominium

Parking Structures

Connemara Parking Garage

Connemara Condominium

Corrosion of parking garage

PatchGuard Galvanic Anodes

Learn More
Learn More about Connemara Parking Garage

Learn More About PatchGuard™ Galvanic Anodes

Learn How PatchGuard™ Galvanic Anodes can mitigate the effects of corrosion and extend service life of repairs

Contact Information

Which option best describes you?

Where is the property located?

Describe the phase of Corrosion Mitigation your structure is in: