Alterna Caviar Bond Repair Sealing Serum. 'How do I repair and seal split ends in my hair and protect them from heat damage and heat styling'. The answer is simple. Alterna Caviar Bond Repair Sealing Serum. A hair repair concentrate that protects, repairs and seals hair in one step. You can use it by blow drying into your hair from wet or as a finished on dry hair to tame and control split ends and flyaway hair.