BIOLAGE Strength Recovery Repairing Spray For Dry Damaged Hair Heat Protect. Strength Recovery Strength Repairing Spray infused with vegan squalane is a lightweight leave-in treatment for damaged hair that strengthens while protecting sensitized hair. This lightweight spray provides heat protection and leaves hair silky, detangled and 82% more manageable after one use Strength Recovery helps repair ALL types of damage and is formulated with 100% active vegan squalane to strengthen and protect hair.