alfresco - top of tile is not compliant

Delf 22mm Black Builders Wedge - 10 Pack
Question: thinking of using few of these rubber wedges lined up side by side to make the top of the tile no climbable, will it work? anyone tried it or used it? inspector advised to install 60 degree wedge, looking for simple, cost effective solution, please help!
many thanks in advance!
Sheeba