How To Repair Vertical and Overhead Concrete with Built-In Fire Resistance

This video will demonstrate how to mix and apply Belzona 4141FR. This fire-resistant and lightweight repair composite has been designed for the rebuilding and protection of damaged vertical and overhead concrete surfaces. 

This high-build material simplifies application whilst providing durable results, both thanks to its mechanical properties and the fact that it is fire resistant. It will not propagate flames and releases little to no smoke. 

For this repair, you will need Belzona 4141FR, Belzona 4911 (Surface Conditioner) and a few hand tools. This material does not require the need for specialist tools, making the application easy to complete. 

How to step-by-step guidelines: 

1. First, mix the Belzona 4911 surface conditioner. Pour the solidifier into the base and stir thoroughly until completely mixed.  
2. Apply the conditioner into the surface to be treated with a stiff bristled brush. 
3. Empty the aggregate bag into the mixing bucket of a forced action mechanical mixer. 
4. Next, add the entire contents of the Belzona 4141FR solidifier to the base component. Stir thoroughly until completely mixed.   
5. Pour the resin into the aggregate with the forced action mixer running. 
6. To ensure all the resin has been added, turn off the forced action mixer and scoop a portion of aggregate into the resin container. Use a spatula to roughly blend the resin into the aggregate. 
7. Restart the forced action mixer and empty the aggregate back into the bucket. 
8. Mix together for a minimum of 5 minutes to achieve an even colour and consistency. Avoid losing any of the mixed resin by periodically scraping the sides and paddle. 
9. When fully mixed, the material will bind together, maintaining its shape when squeezed into a ball by gloved hand. 
10. Prior to application, the mixed material can be transferred back to the bucket for convenience and transportation to the work area. 
11. Gradually add the repair material in sections, using a steel float or gloved hand, pressing firmly into the conditioned areas. Light pressure should be applied, with the float held at a shallow angle. 
12. For corner sections of concrete, using a hawk and steel float, the material should be compressed into the repair area. 
13. Once compressed, slide the hawk away from the repair area. 
14. For vertical repairs, build the material in sections from the bottom of the defect, moving upwards until the entire void is filled. 
15. Smooth over the repair using a clean steel float for the best finish 
16. The application is now complete