KHIA headerKnow-How in Action


Belzona® Mr7 Holding Back Storm Water And Keeping Offices Dry



Heating, Ventilation & Air Conditioning (HVAC)



Roof Problem Areas (RPA)


Customer Location:

International Airport, Florida, USA


Application Date:

Spring 2017


Application Situation:

Rental car offices flooded with the storm water due to an air handler room drain back up.  



Storm water drain backing up into the air handler room adjacent to rental offices on the lower level of the main terminal of the airport. This storm/waste water had caused thousands of dollars in damages and they wanted something to prevent it from seeping into the adjacent offices.



Belzona 3121 (MR7)



Concrete floor and drywall


Application Method:

A modified version of Belzona Know-How System Leaflet RPA-8 was used during the application. Belzona 3121 with a reinforcement sheet was applied 3" out from the wall and 3" up the wall. 


Belzona Facts:

The application sustained another drain back up a few days later and no leakage occured into the adjacent offices. 


Photographs Description

1. Storm drain that would back up and flood.

2. Area previously effected by the flooded storm water.

3. First coat of 3121 (MR7) and reinforcement sheet applied and ready for the second coat.

4. Final coat of Belzona 3121 (MR7)

Case study pic one


 Case study pic two


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 Case study pic four


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