Amber Keratin Grain Rice / Granules. When it comes to hair extension application granules (Keratin Grain Rice) is the best quality keratin to use. It comes available in 100 grams and can be used with a hot pot or heat fusion connector. It is suitable for any coloured hair and ideal for pre-tipping a variety of hair extensions. You can remove the firm Amber colour from the hair easily, the keratin glue drys/sets fast. 100 Gram Keratin also available in Black and Brown.