Alterna Caviar Bond Repair Leave In Treatment Mousse. How do I rebuild and repair my extremely damaged bleached and over processed hair? By using Caviar Bond Repair Treatment Mousse you will reduce breakage by up to 99% and protect hair from heat styling damage up to 232 degrees C. How to use Caviar Bond Repair Mousse - use an egg size amount and work through your washed and conditioned hair whilst it is still damp. Do not rinse out of your hair and style as usual. Why should I leave a hair treatment in my hair? Because if you rinse this treatment out you are not allowing your hair to receive the full benefits of the Caviar Bond Repair Leave-in-Treatment Mousse.