How to attach capping stones to brick retaining wall?

[ludicrousgib]

I've got a double brick retaining wall, and I'm having trouble attaching cement coping stones to the top. I've tried cement mortar and Selleys Liquid Nails Landscape Stone Concrete Adhesive, but they keep coming loose. 

Any suggestions on how to permanently attach them?

[EricL]

Hello @ludicrousgib 

Thanks for sharing your question about your capping stones. Can you please provide us with a little bit more information in regards to the brick retaining wall. Is it painted or was a sealer applied to the brick surface? Is the brick surface currently damp? Is it dusty and crumbling or is the top of the brick rendered? It might be necessary to use the Dunlop 20kg Universal Tile Adhesive or the Davco 20kg SMP Evo Tile Adhesive. The tile glues I've suggested should provide more of a cohesive grip to the stone.

Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.

Please remember to wear personal protection such as gloves, glue and a mask. When working on your project.

If you need further assistance, please let us know.

Eric