KHIA headerKnow-How in Action


Belzona® Provides Long-Term Performance In Bridge Joints



Buildings & Structures (BSTR)



Floor Problem Areas (FPA)


Customer Location:

Department of Transportation, USA


Application Date:



Application Situation:

Joints in the east embankment of the bridge



Joints needed to be sealed between existing armor plates on the bridge



Belzona® 4521 (Magma-Flex Fluid)



Concrete and steel


Application Method:

Application was carried out in accordance with the Belzona Know-How System Leaflet FPA-6 using approximately 200 cu in of Belzona® 4521.


Belzona Facts:

Belzona solution has a long successful history providing long term performance. After 5 years in service, Belzona® 4521 application was reviewed and showed no signs of leakage after several hours of hard rain. An intentional pinhole was added during installation to test failure resistance. Pinhole also remained unchanged after 5 years. A conventional silicone joint material installed on the other part of the bridge began leaking within 12 months of being placed.


Photographs Description

  1. Application of Belzona® 4521 between the armor plates
  2. The intentional pinhole in the bay beneath Belzona application remains unchanged after 5-year service
  3. The bays on the east end of the bridge beneath Belzona application shows no signs of leakage after 5-year service
Case study pic one


 Case study pic two


 Case study pic three




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