I'm hoping someone may have some experience with an injectable epoxy ,that can be used to fill large voids under polished stone on an exterior balcony. I have about 10 stones that have begun to t-pee where a guest house joins up with the main house balcony ,they are not completely lifted,and matching this stone is proving to be difficult,the costumer is very particular being this is a waterfront 6 million dollar home in the Florida Keys,so if I can drill, fill and re bond them I can grind and refinish along with the rest of the existing stone

Any product suggestions would be greatly appreciated Thanks  Scott Wilson, Wilson Stoneworks Inc