My kitchen has black sealant between the dark tiles and the horizontal worksurfaces and metal sink. The sealant is three years old and has fallen out around the sink (in spite of being wiped dry each time the sink had been used), and has parted from the worksurface all the way along. Four years ago the same fitter installed a bathroom, and the white sealant used is still 100%. I need to replace the kitchen black sealant. I've no idea what product was used. Do black sealants contain particles...
Problems with black sealant
Problems with black sealant