How to repair a corroded tank base with Belzona 3111

A step-by-step how-to guide:

Step 1: Light corrosion on the annular ring and tank wall can be manually prepared using handheld tools. The concrete base should also be abraded to remove all loose and deteriorated material.

Step 2: Define the repair area using tape.

Step 3: Prime the repair area using Belzona 3921 Conditioner. Mix base and solidifier thoroughly and apply the mixed material to the prepared tank wall, annular ring and the concrete base using a brush.

Step 4: Allow the conditioner to dry for a minimum of four hours, insert a backer rod into the void between the tank chime and the concrete base.

Step 5: Apply bridging tape across the tank base joint.

Step 6: Define the repair area with a tape to prepare for the coating application.

Step 7: Pre-measured and pre-cut pieces of reinforcement sheet can be applied with the first coat of the coating or embedded into it while it is still wet.

Step 8: Pre-cut pieces of reinforcement sheet should not be stretched or creased and should be positioned to follow the contour of the surface.

Step 9: Once the first coat is dry, apply the second coat of Belzona 3111.

Step 10: All pinholes and areas not wetted out previously should be fully covered and filled by the second layer to produce a continuous unbroken film.

Step 11: Remove the tape and allow the coating to dry.