Sikaflex Removal

Hi All, I am finishing off a water feature which has light grey granite tiles on the top and a thin black slate stack stone vertically. There is a gap of varying thicknesses along it which I plan to fill with Sikaflex. My questions are as follows: 1) First attempt looks crap. I used a light grey Sikaflex and due to the characteristics of uneven stack stone it looks awful. I am considering that Black may be better to try and get a more even look with the granite straight line. ...

More...