Hi all, New member here (so I don't think I can post pics yet). We have holes appearing in (under) our coping mortar and are looking at how to correct this. Have considered a silicon caulk, but obvioulsy color and 'texture' matching is an issue. Would consider packiing the holes with new mortar, but the installer won't answer my calls and texts to come and repair (or even to tell me the brand and color of the mortar used)! Any suggestions?