The shiny turquoise bits we had in our original sealant formula can look a bit of a mess stuck to the inside of your tyre carcass - but they did work really well at sealing holes. We tried loads of different shape / size / thickness biodegradable additives to move away from the glitter bits... And tested removing it completely... But ultimately the original size, shape and material always performed the best so we simply changed them to be black to blend in with tyre carcasses and look far less messy if it gets sprayed everywhere.